POWER OF ATTORNEY

      KNOW ALL BY THESE PRESENTS, that the undersigned hereby makes, constitutes
and appoints Bo Tan, acting singly and with full power of substitution or
revocation, the undersigned's true and lawful attorney-in-fact, with full power
and authority as hereinafter described on behalf of and in the name, place and
stead of the undersigned to:

      (i) execute for and on behalf of the undersigned, in the undersigned's
          capacity as a director, officer or beneficial owner of ordinary shares
          of Summit Healthcare Acquisition Corp., a Cayman Islands exempted
          company (the "Company"), any Schedule 13D or Schedule 13G, and any
          amendments, supplements or exhibits thereto (including any joint
          filing agreements) required to be filed by the undersigned under
          Section 13 of the Securities Exchange Act of 1934, as amended, and the
          rules promulgated thereunder (the "Exchange Act"), and any Forms 3, 4,
          and 5 and any amendments, supplements or exhibits thereto required to
          be filed by the undersigned under Section 16(a) of the Exchange Act;

     (ii) do and perform any and all acts for and on behalf of the undersigned
          which may be necessary or desirable to complete and execute any such
          schedules or forms and timely file such forms with the United States
          Securities and Exchange Commission and any applicable stock exchange;
          and

    (iii) take any other action of any type whatsoever in connection with the
          foregoing which, in the opinion of such attorneys-in-fact, may be of
          benefit to, in the best interest of, or legally required by, the
          undersigned, it being understood that the documents executed by such
          attorney-in-fact on behalf of the undersigned pursuant to this Power
          of Attorney shall be in such form and shall contain such terms and
          conditions as such attorney-in-fact may approve in such attorney-in-
          fact's discretion.

      The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted. The undersigned acknowledges
that the foregoing attorney-in- fact, in serving in such capacity at the request
of the undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with, or any liability for the failure
to comply with, Section 13 and/or Section 16 of the Exchange Act.

      This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file reports or schedules under Section 13
or Section 16 of the Exchange Act with respect to the Company, unless earlier
revoked by the undersigned in a signed writing delivered to the foregoing
attorney-in-fact.

                                  *  *  *  *  *


      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 8th day of June 2021.



                                           By: /s/ Ken Poon
                                               --------------------------------
                                           Name:  Ken Poon
                                           Title: Director