FORM OF FORTH EXTENSION OF LETTER OF LOCK-UP UNDERTAKING Date: From: (the " Optionee ") To: Regencell Bioscience Holdings Limited (the " Company ") References are made in this forth extension of the letter of lock-up und

FORM OF FORTH EXTENSION OF LETTER

OF LOCK-UP UNDERTAKING

References are made in this forth extension of the letter

of lock-up undertaking (this "Fourth Extension of Lock-Up Undertaking") to:

For good and valuable consideration received

by the Optionee from the Company, the Optionee hereby agrees to enter into this Fourth Extension of Lock-Up Undertaking to extend the

Lock- Up Undertakings for an additional fifteen months until April 20, 2026.

The laws of New York shall govern the

interpretation, validity, administration, enforcement, and performance of the terms of this Fourth Extension of Lock-Up Undertaking, regardless

of the law that might be applied under principles of conflicts of laws.

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IN WITNESS WHEREOF, the Optionee has executed this letter

agreement as of the date first set forth above.

Signature Page of Forth Extension of Letter

of Lock-Up Undertaking