Document:

Exhibit 10.4

 

KEYARCH ACQUISITION
CORPORATION

 

PRIVATE PLACEMENT
UNIT SUBSCRIPTION AGREEMENT

 

This UNIT SUBSCRIPTION
AGREEMENT (this “Agreement”) is made as of  January 24, 2022 by and between Keyarch Acquisition
Corporation, a Cayman Islands exempted company (the “Company”), having its principal place of business at
275 Madison Avenue, 39th Floor New York, New York 10016, Keyarch Global Sponsor Limited, a Cayman Islands exempted
company (the “Sponsor”) and EarlyBirdCapital, Inc., a New York Corporation
(“EarlyBirdCapital” and, together with the Sponsor, the “Purchasers”).

 

WHEREAS, the Company desires
to conduct an initial public offering (the “IPO”), as described and conducted in accordance with a Registration
Statement on Form S-1 (SEC File. No. 333-261500) (the “Registration Statement”) filed by the Company with the Securities
and Exchange Commission (the “SEC”), of 10,000,000 units (the “Units”) (or 11,500,000
Units if the underwriter’s over-allotment (the “Over-Allotment Option”) is exercised in full), each Unit
consisting of one Class A ordinary share of the Company, par value $0.0001 per share (the “Ordinary Shares”),
one-half (1/2) of one warrant to purchase one Ordinary Share (each whole warrant, a “Warrant”), and one right
to receive one-tenth (1/10) of one Ordinary Share (the “Right”).

 

WHEREAS, the Company
desires to sell on a private placement basis (the “Offering”) an aggregate of 500,000 units (the
 “Initial Private Units”) of the Company (consisting of 450,000 Initial
Private Units to be purchased by the Sponsor and 50,000 Initial Private Units to be purchased by EarlyBirdCapital and/or its
designees), and up to an additional 45,000 Additional Private Units (“Additional Private Units” and
together with the Initial Private Units, the “Private Units”) of the Company (consisting of up
to 40,500 Additional Private Units to be purchased by the Sponsor and up to 4,500 Additional Private Units to be purchased by
EarlyBirdCapital and/or its designees) in the event that the Over-Allotment Option is exercised in full or part. Each Private
Unit is comprised of one Class A ordinary share of the Company, par value $0.0001 per share (the “Private
Shares”), one-half (1/2) of one warrant to purchase one Private Share (each whole warrant, a “Private
Warrant” and such Private Shares, the “Warrant Shares”), and one right to receive one-tenth
(1/10) of one Private Share (a “Private Right” and each Private Share, the “Right
Shares” and the Right Shares together with the Warrant Shares and Private Shares underlying the Private Units, the
 “Unit Shares”), for a purchase price of $10.00 per Private Unit. The Private Warrants are governed by the
Private Warrant Agreement (defined herein) and the Private Rights are governed by the Rights Agreement (defined herein).

 

WHEREAS, the Purchasers desire
to purchase up to 545,000 Private Units in the aggregate and the Company wishes to accept such subscription.

 

NOW, THEREFORE, in consideration
of the promises and the mutual covenants hereinafter set forth and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the Company and the Purchasers hereby agree as follows:

 

1.                 
Agreement to Subscribe

 

1.1              Purchase
and Issuance of the Private Units. For the aggregate sum of $5,000,000 (the “Initial Purchase Price”),
upon the terms and subject to the conditions of this Agreement, the Purchasers hereby agree to purchase from the Company, and the
Company hereby agrees to sell to the Purchasers, on the Closing Date (as defined in Section 1.2) 500,000 Initial Private Units
at $10.00 per Initial Private Unit, with the Sponsor agreeing to purchase 450,000 of such Initial Private Units and EarlyBirdCapital
(and/or its designees) agreeing to purchase 50,000 of such Initial Private Units. 

 

     

     

    

 

In addition to the
foregoing, the Purchasers hereby agree to purchase up to 45,000 Additional Private Units at $10.00 per Additional Private Unit for a
purchase price of up to $450,000 (the “Additional Purchase Price” and together with the Initial Purchase
Price, the “Purchase Price”), with the Sponsor agreeing to purchase up to 40,500 of such Additional
Private Units and EarlyBirdCapital (and/or its designees) agreeing to purchase up to 4,500 of such Additional Private Units. The
purchase and issuance of the Additional Private Units shall occur only in the event that the Over-Allotment Option is exercised in
full or part. The total number of Additional Private Units to be purchased hereunder shall be in the same proportion as the amount
of the Over-Allotment Option that is exercised. Each purchase of Additional Private Units shall occur simultaneously with the
consummation of any portion of the Over-Allotment Option.

 

1.2             
Closing. The closing of the purchase and sale of the Initial Private Units shall take place at the offices of Orrick, Herrington
 & Sutcliffe LLP, 45 Howard Street, San Francisco, California, 94105 simultaneously with the consummation of the IPO and the purchase
and sale of the Additional Private Units shall take place upon the consummation of the exercise of all or any portion of the Over-Allotment
Option (each a “Closing Date”).

 

1.3             
Delivery of the Purchase Price. At least one business day prior to the effective date of the Registration Statement, or
the date of the exercise of the Over-Allotment Option, if any, the Purchasers agree to deliver their respective portions of the Initial
Purchase Price or Additional Purchase Price, as the case may be, by certified bank check or wire transfer of immediately available funds
denominated in United States Dollars to Continental Stock Transfer & Trust Company, the Company’s transfer agent, which is hereby
irrevocably authorized to deposit such funds on the applicable Closing Date to the trust account which will be established for the benefit
of the Company’s public shareholders, managed pursuant to that certain Investment Management Trust Agreement to be entered into
by and between the Company and Continental Stock Transfer & Trust Company and into which substantially all of the proceeds of the
IPO will be deposited (the “Trust Account”). If the IPO is not consummated within 14 days of the date the Initial
Purchase Price is delivered to Continental Stock Transfer & Trust Company, each Purchaser's respective portion of the Initial Purchase
Price shall be returned to the Purchasers by certified bank check or wire transfer of immediately available funds denominated in United
States Dollars, without interest or deduction.

 

1.4             
Delivery of Unit Certificate. Upon the applicable Closing Date after delivery of the Purchase Price in accordance with Section 1.3,
the Purchasers shall become irrevocably entitled to receive a unit certificate representing the Private Units purchased hereunder.

 

2.                 
Representations and Warranties of the Purchasers

 

Each Purchaser represents
and warrants, severally and not jointly, to the Company that:

 

     

     

    

 

2.1             
No Government Recommendation or Approval. It understands that no United States federal or state agency or similar agency
of any other country has passed upon or made any recommendation or endorsement of the Company, the Offering, the Private Units, the Private
Shares, the Private Warrants, the Private Rights, the Warrant Shares and the Right Shares (collectively, the “Securities”).

 

2.2             
Organization. The Sponsor alone represents and warrants that it is an exempted company, validly existing and in good standing
under the laws of the Cayman Islands and possesses all requisite power and authority necessary to carry out the transactions contemplated
by this Agreement. EarlyBirdCapital alone represents and warrants that it is a corporation duly organized, validly existing and in good
standing under the laws of the State of Delaware and  possesses all requisite power and authority necessary to carry out the transactions
contemplated by this Agreement.

 

2.3             
Private Offering. It is an “accredited investor” as such term is defined in Rule 501(a) of Regulation D
under the Securities Act of 1933, as amended (the “Securities Act”) or it is not a “U.S. Person”
as defined in Rule 902 of Regulation S (“Regulation S”) under the Securities Act. It acknowledges that the sale
contemplated hereby is being made in reliance on a private placement exemption to “Accredited Investors” within the meaning
of Section 501(a) of Regulation D under the Securities Act and similar exemptions under state law or a non-U.S. Person under Regulation
S.

 

2.4             
Authority. This Agreement has been validly authorized, executed and delivered by the Purchaser and is a valid and binding
agreement enforceable in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency,
fraudulent conveyance or similar laws affecting the enforcement of creditors’ rights generally and subject to general principles
of equity (regardless of whether enforcement is sought in a proceeding at law or in equity).

 

2.5             
No Conflicts. The execution, delivery and performance of this Agreement and the consummation by the Purchaser of the transactions
contemplated hereby do not violate, conflict with or constitute a default under (i) the Purchaser’s organizational documents,
(ii) any agreement, indenture or instrument to which the Purchaser is a party or (iii) any law, statute, rule or regulation
to which the Purchaser is subject, or any agreement, order, judgment or decree to which the Purchaser is subject.

 

2.6             
No Legal Advice from Company. It acknowledges it has had the opportunity to review this Agreement and the transactions contemplated
by this Agreement and the other agreements entered into between the parties hereto with its own legal counsel and investment and tax advisors.
Except for any statements or representations of the Company made in this Agreement and the other agreements entered into between the parties
hereto, it is relying solely on such counsel and advisors and not on any statements or representations of the Company or any of its representatives
or agents for legal, tax or investment advice with respect to this investment, the transactions contemplated by this Agreement or the
securities laws of any jurisdiction. Purchaser understands and acknowledges that the law firm of Orrick, Herrington & Sutcliffe LLP
is not acting as counsel or providing legal advice to Purchaser.

 

     

     

    

 

2.7             
Access to Information; Independent Investigation. Prior to the execution of this Agreement, it has had the opportunity to
ask questions of and receive answers from representatives of the Company concerning an investment in the Company, as well as the finances,
operations, business and prospects of the Company, and the opportunity to obtain additional information to verify the accuracy of all
information so obtained. In determining whether to make this investment, it has relied solely on its own knowledge and understanding of
the Company and its business based upon its own due diligence investigation and the information furnished pursuant to this paragraph.
It understands that no person has been authorized to give any information or to make any representations which were not furnished pursuant
to this Section 2 and it has not relied on any other representations or information in making its investment decision, whether written
or oral, relating to the Company, its operations and/or its prospects.

 

2.8             
Reliance on Representations and Warranties. It understands the Private Units are being offered and sold to it in reliance
on exemptions from the registration requirements under the Securities Act, and analogous provisions in the laws and regulations of various
states, and that the Company is relying upon the truth and accuracy of the representations, warranties, agreements, acknowledgments and
understandings of each Purchaser set forth in this Agreement in order to determine the applicability of such provisions.

 

2.9             
No Advertisements. It is not subscribing for the Private Units as a result of or subsequent to any advertisement, article,
notice or other communication published in any newspaper, magazine, or similar media or broadcast over television or radio, or presented
at any seminar or meeting.

 

2.10         
Legend. It acknowledges and agrees the certificates evidencing the Private Units, the Private Shares, the Private Warrants
and the Private Rights shall bear a restrictive legend (the “Legend”), in form and substance as set forth in
Section 4 hereof, prohibiting the offer, sale, pledge or transfer of the securities, except (i) pursuant to an effective registration
statement covering these securities under the Securities Act or (ii) pursuant to any other exemptions from the registration requirements
under the Securities Act and such laws which, in the opinion of counsel for the Company, is available.

 

2.11         
Experience, Financial Capability and Suitability. It is (i) sophisticated in financial matters and is able to evaluate
the risks and benefits of the investment in the Securities and (ii) able to bear the economic risk of its investment in the Securities
for an indefinite period of time because the Securities have not been registered under the Securities Act and therefore cannot be sold
unless subsequently registered under the Securities Act or an exemption from such registration is available. It has substantial experience
in evaluating and investing in transactions of securities in companies similar to the Company so that it is capable of evaluating the
merits and risks of its investment in the Company and has the capacity to protect its own interests.

 

2.12         
Investment Purposes. It is purchasing the Securities solely for investment purposes, for its own account and not for the
account or benefit of any other person, and not with a view towards the distribution or dissemination thereof and it has no present arrangement
to sell the interest in the Securities to or through any person or entity. 

 

     

     

    

 

2.13         
Restrictions on Transfer. It acknowledges and understands the Private Units are being offered in a transaction not involving
a public offering in the United States within the meaning of the Securities Act. The Securities have not been registered under the Securities
Act, and, if in the future, it decides to offer, resell, pledge or otherwise transfer the Securities, such Securities may be offered,
resold, pledged or otherwise transferred only (A) pursuant to an effective registration statement filed under the Securities Act,
(B) pursuant to an exemption from registration under Rule 144 promulgated under the Securities Act (“Rule 144”),
if available, or (C) pursuant to any other available exemption from the registration requirements of the Securities Act, and in each
case in accordance with any applicable securities laws of any state or any other jurisdiction. It agrees that if any transfer of its Securities
or any interest therein is proposed to be made, as a condition precedent to any such transfer, it may be required to deliver to the Company
an opinion of counsel satisfactory to the Company. Absent registration or another available exemption from registration, it agrees it
will not resell the Securities. It further acknowledges that because the Company is a shell company, Rule 144 may not be available to
it for the resale of the Securities until the one-year anniversary following consummation of the initial Business Combination (defined
below) of the Company, despite technical compliance with the requirements of Rule 144 and the release or waiver of any contractual transfer
restrictions. In addition to the foregoing, the Purchaser acknowledges and agrees that it will be executing an insider letter and lockup
agreement with the Company and EarlyBirdCapital as underwriters’ representative, further restricting the Purchaser’s ability
and rights to transfer any Securities.

 

3.                 
Representations and Warranties of the Company

 

The Company represents and
warrants to each Purchaser that:

 

3.1             
Valid Issuance of Share Capital. The total number of all classes of share capital which the Company has authority to issue
is (i) 180,000,000 Class A ordinary shares, (ii) 20,000,000 Class B ordinary shares and (iii) 1,000,000 preference shares. As of
the date hereof, the Company has issued 2,875,000 Class B ordinary shares (of which up to 375,000 Class B ordinary shares are subject
to forfeiture as described in the Registration Statement related to the IPO) and has not issued any preference shares. All of the issued
share capital of the Company has been duly authorized, validly issued, and are fully paid and non-assessable.

 

3.2             
Title to Securities. Upon issuance in accordance with, and payment pursuant to, the terms hereof, the warrant agreement
to be entered into with Continental Stock Transfer & Trust Company on or prior to the closing of the IPO (“Private Warrant
Agreement”), the rights agreement to be entered into with Continental Stock Transfer & Trust Company on or prior to
the closing of the IPO (the “Rights Agreement”) and the Amended and Restated Memorandum and Articles of Association
of the Company, as the case may be, each of the Private Units, Private Warrants, Private Rights and the Private Shares will be duly and
validly issued, fully paid and non-assessable. On the date of issuance of the Private Units, the Warrant Shares and the Right Shares shall
have been reserved for issuance. Upon issuance in accordance with the terms hereof, the Private Warrant Agreement and the Amended and
Restated Memorandum and Articles of Association of the Company, the Purchasers will have or receive good title to the Warrant Shares,
free and clear of all liens, claims and encumbrances of any kind, and upon issuance in accordance with the terms hereof, the Rights Agreement
and the Amended and Restated Memorandum and Articles of Association of the Company, the Purchasers will have or receive good title to
the Right Shares, free and clear of all liens, claims and encumbrances of any kind other than (i) any contractual transfer restrictions
and (ii) transfer restrictions under federal and state securities laws.

 

     

     

    

 

3.3             
Organization and Qualification. The Company has been duly incorporated and is validly existing as a Cayman Islands exempted
company and has the requisite corporate power to own its properties and assets and to carry on its business as now being conducted.

 

3.4             
Authorization; Enforcement. (i) The Company has the requisite corporate power and authority to enter into and perform
its obligations under this Agreement and to issue the Securities in accordance with the terms hereof, (ii) the execution, delivery
and performance of this Agreement by the Company and the consummation by it of the transactions contemplated hereby have been duly authorized
by all necessary corporate action and no further consent or authorization of the Company or its Board of Directors or shareholders is
required, and (iii) this Agreement constitutes, and upon the execution and delivery thereof, the Private Warrants and Private Warrant
Agreement, and the Rights and Rights Agreement, will constitute, valid and binding obligations of the Company enforceable against the
Company in accordance with their respective terms, except as such enforceability may be limited by applicable bankruptcy, insolvency,
fraudulent conveyance, moratorium, reorganization, or similar laws relating to, or affecting generally the enforcement of, creditors’
rights and remedies or by equitable principles of general application and except as enforcement of rights to indemnity and contribution
may be limited by federal and state securities laws or principles of public policy.

 

3.5             
No Conflicts. The execution, delivery and performance of this Agreement and the consummation by the Company of the transactions
contemplated hereby do not (i) result in a violation of the Company’s Memorandum and Articles of Association, (ii) conflict
with, or constitute a default under any agreement, indenture or instrument to which the Company is a party or (iii) conflict with
any law statute, rule or regulation to which the Company is subject or any agreement, order, judgment or decree to which the Company is
subject. Other than any federal, state or foreign securities filings which may be required to be made by the Company subsequent to the
Closing, and any registration statement which may be filed pursuant thereto, the Company is not required under federal, state or local
law, rule or regulation to obtain any consent, authorization or order of, or make any filing or registration with, any court or governmental
agency or self-regulatory entity in order for it to perform any of its obligations under this Agreement or issue the Securities in accordance
with the terms hereof.

 

4.                 
Legends

 

4.1             
Legend. The Company will issue the Securities, purchased by the Purchasers, in the name of the Purchasers. The Securities
will bear the following Legend and appropriate “stop transfer” instructions: 

 

     

     

    

 

THESE SECURITIES (i) HAVE
NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND THESE
SECURITIES MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
FILED UNDER THE SECURITIES ACT, (B) TO A NON-U.S. PERSON IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 903 OR RULE 904 OF REGULATION
S UNDER THE SECURITIES ACT, (C) PURSUANT TO THE RESALE LIMITATIONS SET FORTH IN RULE 905 OF REGULATION S UNDER THE SECURITIES ACT,
(D) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (E) PURSUANT TO ANY
OTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES OR ANY OTHER JURISDICTION. HEDGING TRANSACTIONS INVOLVING THESE SECURITIES MAY NOT BE CONDUCTED UNLESS
IN COMPLIANCE WITH THE SECURITIES ACT.

 

“THE SECURITIES REPRESENTED
BY THIS CERTIFICATE ARE SUBJECT TO AN AGREEMENT BETWEEN KEYARCH ACQUISITION CORPORATION AND KEYARCH GLOBAL SPONSOR LIMITED AND MAY ONLY
BE OFFERED, SOLD, TRANSFERRED, PLEDGED OR OTHERWISE DISPOSED DURING THE TERM OF THE LOCKUP PURSUANT TO THE TERMS SET FORTH THEREIN.”

 

4.2             
Purchasers’ Compliance. Nothing in this Section 4 shall affect in any way the Purchasers’ obligations and
agreements to comply with all applicable securities laws upon resale of the Securities.

 

4.3             
Company’s Refusal to Register Transfer of the Securities. The Company shall refuse to register any transfer of the
Securities, if in the sole judgment of the Company such purported transfer would not be made (i) pursuant to an effective registration
statement filed under the Securities Act, or (ii) pursuant to an available exemption from the registration requirements of the Securities
Act.

 

4.4             
Registration Rights. The Purchasers will be entitled to certain registration rights with respect to the Ordinary Shares
held by them which will be governed by a registration rights agreement (“Registration Rights Agreement”) to
be entered into with the Company on or prior to the closing of the IPO.

 

5.                 
Lockup

 

The Purchasers acknowledge
and agree severally, and not jointly, that the Securities shall not be transferable, saleable or assignable until thirty (30) days after
the consummation of an acquisition, share exchange, purchase of all or substantially all of the assets of, or any other similar business
combination with one or more businesses or entities (a “Business Combination”), except (a) to the Company's
officers or directors, any affiliates or family members of any of the Company's officers or directors, any partners of the Sponsor, or
any affiliates of the Sponsor, (b) in the case of an individual, by gift to a member of the individual’s immediate family or to
a trust, the beneficiary of which is a member of the individual’s immediate family or an affiliate of such person, or to a charitable
organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of the individual; (d) in the
case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with the
consummation of a business combination at prices no greater than the price at which the securities were originally purchased; (f) in
the event of our liquidation prior to our completion of our initial business combination; (g) by virtue of the laws of Cayman Islands
or the Sponsor's articles of association, as amended, upon liquidation of our sponsor; or (h) in the event of our completion of a liquidation,
merger, amalgamation, share exchange, reorganization or other similar transaction which results in all of our shareholders having the
right to exchange their Class A ordinary shares for cash, securities or other property subsequent to our completion of our initial business
combination; provided, however, that in the case of clauses (a) through (e) and (g) these permitted transferees must enter into a written
agreement agreeing to be bound by these transfer restrictions. 

 

     

     

    

 

The Private Units issued to
EarlyBirdCapital are deemed compensation by FINRA and are therefore subject to a 180-day lock-up pursuant to FINRA Rule 5110(e)(1) and
may not be sold, transferred, assigned, pledged or hypothecated or be the subject of any hedging, short sale, derivative, put or call
transaction that would result in the economic disposition of the securities by any person for a 180-day period following the effective
date of the Company's initial public offering prospectus except to any selected dealer participating in the offering and the bona fide
officers or partners of the underwriter and any such participating selected dealer.

 

6.                 
Securities Laws Restrictions

 

The Purchasers agree severally,
and not jointly, not to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Securities unless, prior thereto
(a) a registration statement on the appropriate form under the Securities Act and applicable state securities laws with respect to
the Securities proposed to be transferred shall then be effective or (b) the Company shall have received an opinion from counsel
reasonably satisfactory to the Company, that such registration is not required because such transaction complies with the Securities Act
and the rules promulgated by the Securities and Exchange Commission thereunder and with all applicable state securities laws.

 

7.                 
Waiver of Distributions from Trust Account

 

In connection with the Securities
purchased pursuant to this Agreement, the Purchasers hereby waive any and all right, title, interest or claim of any kind in or to any
distributions from the Trust Account.

 

8.                 
Rescission Right Waiver and Indemnification

 

8.1             
Rescission Waiver. The Purchasers understand and acknowledge severally, not jointly, that an exemption from the registration
requirements of the Securities Act requires there be no general solicitation of purchasers of the Private Units. In this regard, if the
Offering were deemed to be a general solicitation with respect to the Private Units, the offer and sale of such Private Units may not
be exempt from registration and, if not, the Purchasers may have a right to rescind their purchase of the Private Units. In order to facilitate
the completion of the Offering and in order to protect the Company, its shareholders and the Trust Account from claims that may adversely
affect the Company or the interests of its shareholders, the Purchasers hereby agree severally, not jointly, to waive, to the maximum
extent permitted by applicable law, any claims, right to sue or rights in law or arbitration, as the case may be, to seek rescission of
its purchase of the Private Units as a result of the issuance of the Private Units being deemed to be in violation of Section 5 of
the Securities Act. The Purchasers acknowledge and agree severally, not jointly, this waiver is being made in order to induce the Company
to sell the Private Units to the Purchasers. The Purchasers agree severally, not jointly, the foregoing waiver of rescission rights shall
apply to any and all known or unknown actions, causes of action, suits, claims or proceedings (collectively, “Claims”)
and related losses, costs, penalties, fees, liabilities and damages, whether compensatory, consequential or exemplary, and expenses in
connection therewith, including reasonable attorneys’ and expert witness fees and disbursements and all other expenses reasonably
incurred in investigating, preparing or defending against any Claims, whether pending or threatened, in connection with any present or
future actual or asserted right to rescind the purchase of the Private Units hereunder or relating to the purchase of the Private Units
and the transactions contemplated hereby.

  

     

     

    

 

8.2             
No Recourse Against Trust Account. The Purchasers agree severally, not jointly, not to seek recourse against the Trust Account
for any reason whatsoever in connection with its purchase of the Private Units or any Claim that may arise now or in the future.

 

8.3             
Section 8 Waiver. The Purchasers agree severally, not jointly, that to the extent any waiver of rights under this Section
8 is ineffective as a matter of law, the Purchasers have offered such waiver for the benefit of the Company as an equitable right that
shall survive any statutory disqualification or bar that applies to a legal right. The Purchasers acknowledge severally, not jointly,
the receipt and sufficiency of consideration received from the Company hereunder in this regard.

 

9.                 
Terms of the Unit

 

The Private Units shall be
substantially identical to the Units offered in the IPO as set forth in the Underwriting Agreement, except the Private Units: (i) will
be subject to the transfer restrictions described herein, and (ii) are being purchased pursuant to an exemption from the registration
requirements of the Securities Act and will become freely tradable only after certain conditions are met or the resale of the Private
Units is registered under the Securities Act. Additionally, so long as any Private Warrants are held by EarlyBirdCapital, Inc. or its affiliates, such Private Warrants will not be
exercisable or convertible more than five years from the commencement of sales of the public offering.

 

10.             
Governing Law; Jurisdiction; Waiver of Jury Trial

 

This Agreement shall be governed
by and construed in accordance with the laws of the State of New York for agreements made and to be wholly performed within such territory.
The parties hereto hereby waive any right to a jury trial in connection with any litigation pursuant to this Agreement and the transactions
contemplated hereby.

 

11.             
Assignment; Entire Agreement; Amendment

 

11.1         
Assignment. Neither this Agreement nor any rights hereunder may be assigned by any party to any other person other than
by the Purchasers, without the prior consent of the Company, to one or more persons agreeing to be bound by the terms hereof. Upon such
assignment by a Purchaser, the assignee(s) shall become Purchaser hereunder and have the rights and obligations provided for herein to
the extent of such assignment.

  

     

     

    

 

11.2         
Entire Agreement. This Agreement sets forth the entire agreement and understanding between the parties as to the subject
matter hereof and supersedes any and all prior discussions, agreements and understandings of any and every nature.

 

11.3         
Amendment. Except as expressly provided in this Agreement, neither this Agreement nor any term hereof may be amended, waived,
discharged or terminated other than by a written instrument signed by the party against whom enforcement of any such amendment, waiver,
discharge or termination is sought.

 

11.4         
Binding upon Successors. This Agreement shall be binding upon and inure to the benefit of the parties hereto and to their
respective heirs, legal representatives, successors and permitted assigns.

 

12.             
Notices; Indemnity

 

12.1         
Notices. All notices, requests, consents and other communications hereunder shall be in writing, shall be addressed to the
receiving party’s address set forth herein or to such other address as a party may designate by notice hereunder, and shall be either
(a) delivered by hand, (b) sent by overnight courier, or (c) sent by certified mail, return receipt requested, postage
prepaid. All notices, requests, consents and other communications hereunder shall be deemed to have been given either (i) if by hand,
at the time of the delivery thereof to the receiving party at the address of such party set forth above, (ii) if sent by overnight
courier, on the next business day following the day such notice is delivered to the courier service, or (iii) if sent by certified
mail, on the fifth business day following the day such mailing is made.

 

12.2         
Indemnification. Except as set forth in Section 8, each party shall indemnify the other party against any loss, cost
or damages (including reasonable attorney’s fees and expenses) incurred as a result of such party’s breach of any representation,
warranty, covenant or agreement set forth in this Agreement.

 

13.             
Counterparts

 

This Agreement may be executed
in one or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective
when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign
the same counterpart. In the event that any signature is delivered by facsimile transmission or any other form of electronic delivery,
such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with
the same force and effect as if such signature page were an original thereof.

 

14.             
Survival; Severability

 

14.1         
Survival. The representations, warranties, covenants and agreements of the parties hereto shall survive the Closing until
one (1) year following the consummation of an initial Business Combination.

 

14.2         
Severability. In the event that any provision of this Agreement becomes or is declared by a court of competent jurisdiction
to be illegal, unenforceable or void, this Agreement shall continue in full force and effect without said provision; provided that
no such severability shall be effective if it materially changes the economic benefit of this Agreement to any party.

  

     

     

    

 

15.             
Headings

 

The titles and subtitles used
in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

 

16.             
Construction

 

The parties hereto have participated
jointly in the negotiation and drafting of this Agreement. If an ambiguity or question of intent or interpretation arises, this Agreement
will be construed as if drafted jointly by the parties hereto and no presumption or burden of proof will arise favoring or disfavoring
any party hereto because of the authorship of any provision of this Agreement. The words “include,” “includes,”
and “including” will be deemed to be followed by “without limitation.” Pronouns in masculine, feminine,
and neuter genders will be construed to include any other gender, and words in the singular form will be construed to include the plural
and vice versa, unless the context otherwise requires. The words “this Agreement,” “herein,” “hereof,”
 “hereby,” “hereunder,” and words of similar import refer to this Agreement as a whole and not to
any particular subdivision unless expressly so limited. The parties hereto intend that each representation, warranty, and covenant contained
herein will have independent significance. If any party hereto has breached any representation, warranty, or covenant contained herein
in any respect, the fact that there exists another representation, warranty or covenant relating to the same subject matter (regardless
of the relative levels of specificity) which such party hereto has not breached will not detract from or mitigate the fact that such party
hereto is in breach of the first representation, warranty, or covenant.

 

[remainder of page intentionally left blank]

     

     

    

 

 

This subscription is accepted by the Company as
of the date first written above.

 

	 	KEYARCH
                                            ACQUISITION CORPORATION
	 	 	 
	 	By:	/s/
    Kai Xiong
	 	Name:	Kai Xiong
	 	Title:	Chief Executive Officer

 

	Accepted and agreed this	 
	 	 
	KEYARCH GLOBAL SPONSOR LIMITED	 
	 	 
	By:	/s/ Kai Xiong 	 
	Name:	Kai Xiong	 
	Title:	Director	 
	 	 	 
	EARLYBIRDCAPITAL, INC.	 
	 	 
	By:	/s/ Michael Powell 	 
	Name:	Michael Powell	 
	Title:	Sr. Managing Director	 

 

  

[Signature Page for Private Placement Unit Subscription
Agreement]Exhibit 10.5

 

Keyarch Acquisition Corporation

 

January 24, 2022

 

Keyarch Global Sponsor, Ltd.

Walkers Corporate Limited 

190 Elgin Avenue 

George Town, Grand Cayman KY1-9008 

Cayman Islands

 

Ladies and Gentlemen:

 

This letter will confirm our agreement that, commencing
on the effective date (the “Effective Date”) of the registration statement (the “Registration Statement”)
for the initial public offering (the “IPO”) of the securities of Keyarch Acquisition Corporation (the “Company”)
and continuing until the earlier of (i) the consummation by the Company of an initial business combination and (ii) the Company’s
liquidation (in each case as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination
Date”), Keyarch Global Sponsor, Ltd. (the “Sponsor”) shall take steps directly or indirectly
to make available to the Company certain office space, secretarial and administrative services as may be required by the Company from
time to time, situated at 275 Madison Avenue, 39th floor, New York, New York 10016 (or any successor location). In exchange
therefore, the Company shall pay the Sponsor a sum of up to $10,000 per month commencing on the Effective Date and continuing monthly
thereafter until the Termination Date. The Sponsor hereby agrees that it does not have any right, title, interest or claim of any kind
(a “Claim”) in or to any monies that may be set aside in a trust account (the “Trust Account”)
that may be established in connection with and upon the consummation of the IPO and hereby irrevocably waives any Claim it presently has
or may have in the future as a result of, or arising out of, any negotiations, contracts or agreements with the Company and will not seek
recourse, reimbursement, payment or satisfaction of any Claim against the Trust Account or any monies or other assets in the Trust Account
for any reason whatsoever.

 

This letter agreement constitutes
the entire agreement and understanding of the parties hereto in respect of its subject matter and supersedes all prior understandings,
agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter
hereof or the transactions contemplated hereby.

 

This letter agreement may
not be amended, modified or waived as to any particular provision, except by a written instrument executed by the parties hereto.

 

The parties may not assign
this letter agreement and any of their rights, interests, or obligations hereunder without the consent of the other party. Any purported
assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title
to the purported assignee.

 

This letter agreement shall
be governed by, construed in accordance with, and interpreted pursuant to the laws of the State of New York, without giving effect to
its choice of laws principles that will apply the laws of another jurisdiction.

 

    

     

    

 

This letter agreement may
be executed in one or more counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall
constitute one and the same agreement. Only one such counterpart signed by the party against whom enforceability is sought needs to be
produced to evidence the existence of this letter agreement.

 

[Signature Page Follows]

 

    2

     

    

 

	 	 	Very truly yours,
	 	 	 
	 	 	KEYARCH ACQUISITION CORPORATION
	 	 	 	 
	 	 	 	By:	/s/ Kai Xiong
	 	 	Name:	Kai Xiong
		 	Title:	Chief Executive Officer
	AGREED TO AND ACCEPTED BY:	 	 
	 	 	 
	KEYARCH GLOBAL SPONSOR, LTD.	 	 
	 	 	 
	By:	/s/ Kai Xiong	 	 
	Name:	Kai Xiong	 	 
	Title:	Director	 	 

 

    3

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