Document:

EXHIBIT 4.12

Memorandum of Agreement

Made and executed this 25th day of September 2017

Between:

Ms. Rachel Sacks Identity No. 295813

Dr. Moshe Eliash Identity No. 1940998

(both of them jointly and severally)

(hereinafter called – “the Landlord”)

of the one part;

And:

Sol Gel Technologies Ltd.

Corporate number 51-2544693

 (hereinafter called: “the Tenant”)

of the other part

	(1)	
By a tenancy agreement signed between the parties on October 10, 2007 (hereinafter: “the Tenancy Agreement”) the Tenant took a lease of the Premises (as defined in that Agreement);

	(2)	
Pursuant to the second addendum to the Tenancy Agreement dated March 30, 2016, and pursuant to a memorandum of agreement dated September 20, 2016, the Tenant leased additional areas on the sixth floor of the Building as defined in the Tenancy Agreement (hereinafter: “the Additional Areas”);

	(3)	
The Tenant wishes to install a stand-alone air conditioning system part of the Additional Areas and for that purpose has made openings in the roof of the building and is effecting alterations in the existing air conditioning system in the building including partially disconnecting the same;

	(4)	
In order to execute the installation of the stand-alone air conditioning system, the Tenant requires and has received the Landlord’s consent subject as hereinafter provided.

It is therefore declared and agreed between the parties as follows:

	1.	
The preamble to this agreement constitute an integral part thereof.

	2.	
The Tenant declares and warrants that it made the openings in the roof of the building during the course of executing the stand-alone air conditioning system in accordance with the instructions of the constructor of the building, S. Engel Engineers Ltd.

	3.	
The Tenant declares and warrants that it is executing and shall execute the modifications in the air-conditioning system of the building with the approval of Eshet Air-conditioning Ltd, which is the company that maintains the air-conditioning system of the building.

 

	4.	
The Tenant declares and warrants that it will submit to the Landlord, through the maintenance manager of the building, all the end-units that will be dismantled by it from the air-conditioning system of the building, as well as all the other recyclable parts of the system.

	5.	
The Tenant undertakes to complete the installation of the stand-alone air conditioning system within six months of the date of the execution of this Memorandum of Agreement.

	 6.	
The Tenant undertakes to install and maintain the stand-alone air conditioning system that will be installed at its own expense and continue to keep the same in proper working condition throughout the duration of the term of the lease under the Tenancy Agreement. The Town further undertakes to exclusively bear all the operating expenses of the stand-alone air conditioning system that will be installed by it.

	7.	
The Tenant undertakes upon the termination of the term of the lease and its vacation of the Additional Areas and the Premises to deliver into the Landlord’s possession the stand-alone air conditioning system that will be installed by it without payment and in good and proper working condition.

	8.	
The Tenant will be exclusively responsible for indemnifying the Landlord and any third party for and in respect of any damage that will be caused to the building or its systems or to any other person in connection with the installation and operation of the stand-alone air conditioning system that will be installed by it.

	 9.	
Subject to all of the Tenant’s undertakings herein contained, the Landlord’s consent is hereby granted to install the independent air-conditioning system by the Tenant in part of the Additional Areas.

	10.	
Subject to the terms of the Tenancy Agreement, nothing contained in the provisions hereof shall derogate from the terms of the Tenancy Agreement and the provisions of this Memorandum of Agreement.

In witness whereof the parties have set their hands on the date first above written

	
/s/ Moshe Eliash

In the name of Ms. Rachel Sacks

The Landlord

	
/s/ Sol Gel Technologies Ltd.

 

The Tenant

 

2EXHIBIT 4.13

 

Dr. Moshe Eliash

Barrister-at-law, Advocate and Notary

2 Hasoreg St., POB 433

	Telephone 651681, 6054281	
Tuesday, July 3, 2018

Fax 6254282

Jerusalem 91003

Eliash7@bezeqint.net

Sol Gel Technologies Ltd.

7 Golda Meir Street

Ness Siona

Dear Sirs,

re: Tenancy agreement dated January 30, 2017 respecting the fourth floor

It is agreed by the landlords that there will be added to the area that is leased to you according to section 2 of the above agreement a net area of 91 m2 as delineated and hatched in the plan attached hereto as appendix “A” and there will further be added the remainder of the lobby area in a net area of 4 m2. The lobby is similarly delineated and hatched on the plan it being agreed that a moiety thereof was already leased you under the above agreement. In light of the foregoing, the provision contained in section 2 of the above agreement to the effect that the lobby will remain vacant, will be removed, and the lobby, in its entirety, will be comprised in the premises.

Hence, a net area of 95 m2 will be added to the net area of 151 m2 of the premises in accordance with section 2 of the agreement, and the area of the premises in its entirety shall be a net area of 246 m2, constituting a gross area of 307.5 m2.

All the terms of the agreement dated January 30, 2070 will apply to the extended premises area described above, mutatis mutandis.

For the sake of formality, please acknowledge your agreement to the foregoing on the copy of this letter, and return the same to me.

Yours faithfully,

/s/Moshe Eliash

Dr. Moshe Eliash, Advocate

We acknowledge and agree

Agreed and acknowledged. It is clarified that the said addition (95 m2 net) commences from June 1, 2018

/s/

SOL-GEL TECHNOLOGIES LTD.EXHIBIT 4.14

To: Sol Gel Technologies Ltd.

This will confirm the landlords’ agreement to lease to you commencing September 1, 2018, six uncovered parking spaces.

The lease term runs concurrently with the remaining lease term according to your head-lease.

The rent is NIS 300.00 per month for each parking place, (plus VAT).

The rent for one month will be paid upon your agreement to the foregoing. Thereafter, the rent will be paid trimonthly in advance together with the payment of the rent according to the head-lease.

The location of the parking places, which will be contiguous, will be coordinated with the building manager.

Please confirm.

Please send the sum of NIS 1800.00 (plus VAT in the sum of NIS 306.00), aggregating NIS 2,106.00 to the landlords’ bank account.

Sincerely,

Dr. Moshe EliashExhibit 10.1

 

SHARE CANCELLATION AGREEMENT

 

This Share Cancellation
Agreement (this “Agreement”), is made and entered into as of March 15, 2019 (the “Effective Date”),
by and between Mr. Ban Siong Ang (the “Stockholder”), an individual with
an address at 4th Floor, No. 10 Building, Xinglin Bay Business Operation Center, Jimei District, Xiamen City, Fujian Province,
China 361022, and Heyu Biological Technology Corporation, a Nevada corporation (the “Company”). The Stockholder
and the Company are hereinafter sometimes referred to individually as a “party” or collectively as the “parties.”

 

RECITALS:

 

WHEREAS, in
October 2018, a series of share transfer agreements (the “Share Transfer Agreements”) were entered by and between
the Stockholder and certain buyers (the “Buyers”), who are non-U.S.
persons;

 

WHEREAS, pursuant
to the Share Transfer Agreements, the Stockholder transferred an aggregate amount of 109,006,861 shares of common stock of the
Company (the “Shares”) to the Buyers in exchange of cash paid by the Buyers;

 

WHEREAS, pursuant
to the Share Transfer Agreements, the Company authorized and directed its registrar and transfer agent, Standard Registrar and
Transfer Company, Inc. (the “Transfer Agent”), to cancel the Shares held by the Stockholder and to issue an
aggregate amount of 109,006,861 new shares of common stock of the Company (the “New Shares”) to the Buyers through
an instruction letter dated October 17, 2018 (the “Instruction Letter”), attached hereto as Exhibit A;

 

WHEREAS, upon
receiving the Instruction Letter, the Transfer Agent only issued the New Shares to the Buyers and failed to cancel the Shares held
by the Stockholder; and

 

WHEREAS, to
cancel the Shares held by the Stockholder, the Company proposes to enter into the Agreement with the Stockholder.

 

NOW, THEREFORE,
in consideration of the premises and the mutual covenants, warranties, and agreements contained herein, and intending to be legally
bound hereby, the parties hereto agree as follows:

 

Article 1 – Cancellation of the
Shares 

 

		1.1	Cancellation of the Shares. On the Effective Date, the Stockholder shall surrender the Shares
to the Company and relinquish any rights or interests in the Shares, and the Company shall cancel the Shares by providing the Transfer
Agent appropriate instructions.

 

		1.2	Payment to the Stockholder. On the Effective Date, the Company shall pay $10 to
                                                               the Stockholder for the cancellation of the Shares.

 

		1.3	Instruments of Transfer and Further Assurances.

 

		a.	The Stockholder’s Deliveries. On the Effective Date, the Stockholder shall execute
and deliver to the Company the following:

 

		i.	the original stock certificate evidencing his title in the Shares; and

 

		ii.	all documents necessarily required by the Transfer Agent to cancel the Shares.

 

		b.	Further Assurances. The Stockholder and the Company, at the request of either party, shall
deliver any further instruments and take all reasonable actions that may be necessary or appropriate to complete the share cancellation
contemplated by the Agreement.

 

    1 

     

    

  

		1.4	Release. By signing the Agreement, the Stockholder, on behalf of the Stockholder’s
successors and assigns, unconditionally and irrevocably releases and discharges the Company, its officers, directors, partners,
principals, agents, employees, affiliates, and assigns, and the Company, on behalf of its successors and assigns, unconditionally
and irrevocably releases and discharges the Stockholder and the Stockholder’s successors and assigns, from any claims, lawsuits,
causes of action, liabilities, damages, remedies, attorney’s fees, obligations, losses, costs, expenses, third-party demands,
and debts in connection with any disputes arising under or relating to the Shares and the release of the Shares under the Agreement,
whether known or unknown, claimed or suspected, arising under common law, in equity, or under statute.

 

Article 2 – General Provisions

 

		2.1	Parties in Interest. The Agreement binds and benefits the Stockholder, the Company, and
their respective heirs, executors, legal representatives, and assigns, including but not limited to any successor to the Company,
whether by merger, consolidation, sale of stock, or sale of assets.

 

		2.2	Parties Advised by Counsel. The Agreement has been negotiated between parties who are sophisticated
and knowledgeable in the matters contained herein and who have been represented by legal counsel. The provisions of the Agreement
shall be interpreted in a reasonable manner to effect the intention of the parties, and any rule of law which would require interpretation
of any ambiguities in the Agreement against the drafting party is not applicable and is hereby waived. The Stockholder acknowledges
that the Stockholder has been advised by the Company to consult with the Stockholder’s tax advisor to determine the tax consequences
of executing the Agreement, and that the Company is not liable for any taxes owed by the Stockholder arising from or relating to
actions and agreements under the Agreement.

 

		2.3	Execution. If the Agreement is executed in two or more counterparts, all of which taken
together constitutes one and the same instrument. The Stockholder and the Company’s exchange of the Agreement by facsimile
or any other means mutually agreed by the two parties constitutes effective execution and delivery of the Agreement. The signatures
of the Stockholder and the Company, when electronically scanned or signed through any other means deemed appropriate by both parties,
carry the same force and effect as the use of a manual signature.

 

		2.4	Severability. If any provision of the Agreement is invalid or unenforceable in any jurisdiction,
such invalidity or unenforceability does not affect the validity or enforceability of the remainder of the Agreement in that jurisdiction
or the validity or enforceability of any provision of the Agreement in any other jurisdiction.

 

		2.5	Entire Agreement. The Agreement contains the entire understanding of the Stockholder and
the Company with respect to the subject matter contained in the Agreement. The Agreement supersedes all prior agreements and understandings
between the two parties with respect to such subject matter.

 

		2.6	Governing Law. The internal law of State of New York, without regard to principles of conflict
of laws therein, govern all matters arising under or relating to the Agreement, including torts.

 

		2.7	Jurisdiction and Venue. The parties agree that any dispute arising out of or any matter
relating to the Agreement will be adjudicated before a state or federal court located in New York, New York. Both parties consent
to the exclusive jurisdiction of the federal and state courts located in New York, New York with respect to any action, legal proceeding,
or lawsuits commenced by any party in connection with the Agreement and irrevocably waive any objection to the choice of venue
either party now or may have in the future.

 

[Signature page follows]

 

    2 

     

    

 

IN WITNESS WHEREOF, the Agreement
is executed the day and year first above written.

 

	 	The Company:
	 	 
	 	Heyu Biological Technology Corporation
	 	 
	 	/s/ Ban Siong Ang	 
	 	By:	Ban Siong Ang	 
	 	Title:	
        President, Chief Executive Officer

        and Chairman of the Board of Directors

	 	 	 	 
	 	The Stockholder:
	 	 
	 	Mr. Ban Siong Ang
	 	 
	 	/s/ Ban Siong Ang	 
	 	Name: 	Ban Siong Ang	 

 

    3 

     

    

 

Exhibit A

 

Instruction Letter

 

    4

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