Document:

Exhibit 4.2

 

SPECIMEN ORDINARY SHARE CERTIFICATE

 

	NUMBER	SHARES 

_________C

 

CM SEVEN STAR ACQUISITION CORPORATION

 

INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS

 

ORDINARY SHARE

 

SEE REVERSE FOR

CERTAIN DEFINITIONS

 

	THIS CERTIFIES THAT	CUSIP [·]

 

IS THE OWNER OF

 

FULLY PAID AND NON-ASSESSABLE ORDINARY SHARES
OF THE PAR VALUE OF

$0.001 EACH OF

 

CM SEVEN STAR ACQUISITION CORPORATION

 

transferable on the books of the Company in
person or by duly authorized

attorney upon surrender of this certificate
properly endorsed. This certificate is not valid unless

 countersigned by the Transfer Agent and registered by the Registrar. Witness
the seal of

the Company and the facsimile signatures of
its duly authorized officers.

 

Dated:

 

	 	 	 
	Chief Executive Officer	 	Assistant Secretary

 

CM SEVEN STAR ACQUISITION CORPORATION

CORPORATE

SEAL 2010

CAYMAN ISLANDS

 

    	 	 	 

     

    

 

CM SEVEN STAR ACQUISITION CORPORATION

 

The Company will furnish without charge to each
shareholder who so requests the powers, designations, preferences and relative, participating, optional or other special rights
of each class of share or series thereof of the Company and the qualifications, limitations, or restrictions of such preferences
and/or rights. This certificate and the shares represented thereby are issued and shall be held subject to all the provisions of
the Articles of Association and all amendments thereto and resolutions of the Board of Directors providing for the issue of shares
of Preferred Shares (copies of which may be obtained from the secretary of the Corporation), to all of which the holder of this
certificate by acceptance hereof assents.

 

The following abbreviations, when used in the
inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable
laws or regulations:

 

TEN COM - as tenants in common 

TEN ENT - as tenants by the entireties

JT TEN - as joint tenants with right
of survivorship

and not as tenants in common

 

	UNIF GIFT MIN ACT -	 	Custodian	 	 
	 	(Cust)	 	(Minor)	 
	 	under Uniform Gifts to Minors	 
	 	Act	 	 
	 	 	(State)	 

  

Additional Abbreviations may also be used though
not in the above list.

 

For value received, ___________________________
hereby sell, assign and transfer unto

 

	
        PLEASE INSERT SOCIAL SECURITY OR OTHER

        IDENTIFYING NUMBER OF ASSIGNEE
	 
	 	 
	 	 

 

	 
	(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)
	 
	 

 

_____________________________________________________shares
of the capital stock represented by the within Certificate, and do hereby irrevocably constitute and appoint
______________________________________________________Attorney to transfer the said share on the books of the within named
Corporation will full power of substitution in the premises.

 

	Dated	 	 	 

  

    	 	2	 

     

    

 

	 	NOTICE:	The signature to this assignment must correspond with the name as written upon the face of the certificate in every particular, without alteration or enlargement or any change whatever.

 

Signature(s) Guaranteed:

 

 

 

THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION
(BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15).

 

The holder of this certificate shall be entitled to receive funds
from the trust account only in the event of (i) the liquidation of the trust account upon a failure to consummate a business combination,
as described in the prospectus covering the securities or (ii) if the holder seeks to convert his respective shares or sells them
to the Company in a tender offer, in each case in connection with (1) the consummation of a business combination or (2) in connection
with an amendment to our Memorandum and Articles of Association prior to the consummation of a business combination. In no other
circumstances shall the holder have any right or interest of any kind in or to the trust account.

 

    	 	3Exhibit 4.3

SPECIMEN WARRANT
CERTIFICATE

 

	NUMBER	 	[·] WARRANTS
	WA-	 	 

 

(THIS WARRANT WILL
BE VOID IF NOT EXERCISED PRIOR TO 5:00 P.M.

NEW YORK CITY TIME,
FIVE YEARS FROM THE CLOSING DATE OF THE COMPANY’S INITIAL

BUSINESS COMBINATION)

 

CM SEVEN STAR
ACQUISITION CORPORATION

 

CUSIP __________

 

WARRANT

 

THIS WARRANT CERTIFIES
THAT, for value received                                         ,
or registered agents, is the registered holder of a Warrant or Warrants (the “Warrant”), expiring on a date which is
five (5) years from the completion of the Company’s initial business combination, to purchase one fully paid and non-assessable
ordinary share (the “Warrant Shares”), par value US$0.0001 per share (the “Ordinary Shares”), of CM SEVEN
STAR ACQUISITION CORPORATION, a Cayman Islands exempted company (the “Company”), for each Warrant evidenced by this
Warrant Certificate. This Warrant Certificate is subject to and shall be interpreted under the terms and conditions of the Warrant
Agreement (as defined below).

 

The
Warrant entitles the holder thereof to purchase from the Company, from time to time, in whole or in part, commencing on the later
to occur of (i) the completion of the Company’s initial business combination and (ii) twelve (12) months following the closing
of the Company’s initial public offering, such number of Warrant Shares at the price of US$11.50 per share (the “Warrant
Price”), upon surrender of this Warrant Certificate and payment of the Warrant Price at the office or agency of Continental
Stock Transfer & Trust Company (the “Warrant Agent”), such payment to be made subject to the conditions set forth
herein and in the Warrant Agreement, dated [·], 2017, between the Company and the
Warrant Agent (the “Warrant Agreement”). In no event shall the registered holder(s) of this Warrant be entitled to
receive a net-cash settlement in lieu of physical settlement in Warrant Shares of the Company. The Warrant Agreement provides that,
upon the occurrence of certain events, the Warrant Price and the number of Warrant Shares purchasable hereunder, set forth on the
face hereof, may be adjusted, subject to certain conditions. The term Warrant Price as used in this Warrant Certificate refers
to the price per Warrant Share at which Warrant Shares may be purchased at the time the Warrant is exercised.

 

This
Warrant will expire on the date first referenced above if it is not exercised prior to such date by the registered holder pursuant
to the terms of the Warrant Agreement or if it is not redeemed by the Company prior to such date.

 

No
fraction of a Share will be issued upon any exercise of a Warrant. If, upon exercise of a Warrant, a holder would be entitled to
receive a fractional interest in a Share, the Company will, upon exercise, issue or cause to be issued only the largest whole number
of Warrant Shares issuable on such exercise (and such fraction of a Share will be disregarded).

 

Upon
any exercise of the Warrant for less than the total number of full Warrant Shares provided for herein, there shall be issued to
the registered holder(s) hereof or its assignee(s) a new Warrant Certificate covering the number of Warrant Shares for which the
Warrant has not been exercised.

 

Warrant
Certificates, when surrendered at the office or agency of the Warrant Agent by the registered holder(s) hereof in person or by
attorney duly authorized in writing, may be exchanged in the manner and subject to the limitations provided in the Warrant Agreement,
but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor and evidencing
in the aggregate a like number of Warrants.

 

     

     

    

  

Upon
due presentment for registration of transfer of the Warrant Certificate at the office or agency of the Warrant Agent, a new Warrant
Certificate or Warrant Certificates of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to
the transferee(s) in exchange for this Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without
charge except for any applicable tax or other governmental charge.

 

The
Company and the Warrant Agent may deem and treat the registered holder(s) as the absolute owner(s) of this Warrant Certificate
(notwithstanding any notation of ownership or other writing hereon made by anyone) for the purpose of any exercise hereof, of any
distribution to the registered holder(s), and for all other purposes, and neither the Company nor the Warrant Agent shall be affected
by any notice to the contrary.

 

This
Warrant does not entitle the registered holder(s) to any of the rights of a shareholder of the Company.

 

After
the Warrant becomes exercisable and prior to its expiration date, the Company reserves the right to call the Warrant at any time,
with a notice of call in writing to the holder(s) of record of the Warrant, giving 30 days’ notice of such call if the last
reported sale price of the Warrant Shares has been equal to or greater than US$18.00 per share of the Warrant Price for any 20
trading days within a 30 consecutive trading day period ending on the third business day prior to the date on which notice of such
call is given, provided that (i) a registration statement under the Act with respect to the Ordinary Shares issuable upon exercise
must be effective and a current prospectus must be available for use by the registered holders hereof or (ii) the Warrants may
be exercised on cashless basis as set forth in the Warrant Agreement and such cashless exercise is exempt from registration under
the United States Securities Act of 1933, as amended. The call price is US$0.01 per Warrant Share.

 

If
the foregoing conditions are satisfied and the Company calls the Warrant for redemption, each holder will then be entitled to exercise
his, her or its Warrant prior to the date scheduled for redemption; provided that the Company may require the Registered Holder
who desires to exercise the Warrant, to elect cashless exercise as set forth in the Warrant Agreement, and such Registered Holder
must exercise the Warrants on a cashless basis if the Company so requires. Any Warrant either not exercised or tendered back to
the Company by the end of the date specified in the notice of call shall be canceled on the books of the Company and have no further
value except for the $0.01 call price.

 

This
Warrant shall be governed and construed in accordance with the internal laws of the State of New York, without regard to conflicts
of laws principles thereof.

 

COUNTERSIGNED:

CONTINENTAL STOCK TRANSFER & TRUST
COMPANY

WARRANT AGENT

 

	BY:	 	 
	AUTHORIZED OFFICER	 	 
	 	 	 
	DATED:	 	 
	 	 	 
	(Signature)	 	 
	CHIEF EXECUTIVE OFFICER	 	 
	 	 	 
	(Signature)	 	 
	SECRETARY	 	 

 

[REVERSE OF CERTIFICATE]

 

    	 	2	 

     

    

  

SUBSCRIPTION FORM

 

To Be Executed
by the Registered Holder(s) in Order to Exercise Warrants

 

The undersigned
hereby irrevocably elects to exercise the right, represented by this Warrant Certificate, to receive Ordinary Shares in accordance
with the terms of this Warrant Certificate and pursuant to the method selected below. Capitalized terms used herein and not otherwise
defined have the respective meanings set forth in the Warrant Certificate. PLEASE CHECK ONE METHOD OF PAYMENT:

 

	 	 	 	a “Cash Exercise” with respect to                  Warrant Shares; and/or

 

	 	 	 	a “Cashless Exercise” with respect to                  Warrant Shares because on the date of this exercise, there is no effective registration statement registering the Warrant Shares, or the prospectus contained therein is not available for the resale of the Warrant Shares, in which event the Company shall deliver to the registered holder(s)                  Ordinary Shares pursuant to Section 3.3.2 of the Warrant Agreement.
	 	 	 
	 	 	 
	 	 	 

  

 

The undersigned
requests that a certificate for such shares be registered in the name(s) of

 

	 
	 
	(PLEASE TYPE OR PRINT NAME(S) AND ADDRESS)
	 
	 
	 
	 
	 
	 
	(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER(S))

 

	 	 	 
	and be delivered to	 	 
	 	 	(PLEASE PRINT OR TYPE NAME(S) AND ADDRESS)

 

and, if such number of Warrants shall
not be all the Warrants evidenced by this Warrant Certificate, that a new Warrant Certificate for the balance of such Warrants
be registered in the name of, and delivered to, the registered holder(s) at the address(es) stated below:

 

Dated:

 

	 	 	 
	 	 	 
	(SIGNATURE(S))	 	 
	 	 	 
	 	 	 
	(ADDRESS(ES))	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	(TAX IDENTIFICATION NUMBER(S))	 	 

 

ASSIGNMENT

 

    	 	3	 

     

    

 

 

 

To Be Executed
by the Registered Holder in Order to Assign Warrants

 

For Value Received,                                     
hereby sell(s), assign(s), and transfer(s) unto

 

	 	 	 
	 	 	 
	(PLEASE TYPE OR PRINT NAME(S) AND ADDRESS(ES))	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	 

(SOCIAL SECURITY OR TAX IDENTIFICATION
NUMBER(S))

 

	 	 	 	 	 
	and to be delivered to	 	 	 	 
	 	 	(PLEASE PRINT OR TYPE NAME(S) AND ADDRESS(ES))	 	 

 

	 	 	 
	 	 	 
	 	 	 
	(SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER(S))	 	 

 

of the Warrants represented by this
Warrant Certificate, and hereby irrevocably constitute and appoint                     
Attorney to transfer this Warrant Certificate on the books of the Company, with full power of substitution in the premises.

  

	Dated:	 	 
	 	 	 
	 	 	 
	 	 	 
	(SIGNATURE(S))	 	 

 

NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT
MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT
OR ANY CHANGE WHATEVER.

 

Signature(s) Guaranteed:

 

	 	 	 	 
	By	 	 	 

 

THE SIGNATURE(S) MUST BE GUARANTEED
BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN
APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15).

 

    	 	4

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