Item 2.01 Completion of Acquisition or Disposition of Assets.

The information set forth in the Introductory Note of this Current Report on Form 8-K is incorporated by reference herein.

Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing; Material Modification to Rights of Security Holders.

On March 16, 2023, in connection with the consummation of the Business Combination, Summit notified Nasdaq that the Business Combination had become effective and requested that Nasdaq file a Notification of Removal from Listing and/or Registration under Section 12(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), on Form 25 to notify the SEC that Summit's ordinary shares, warrants and units were to be delisted and deregistered under Section 12(b) of the Exchange Act. As a result of the Business Combination having become effective, Nasdaq determined to permanently suspend trading of Summit's ordinary shares, warrants and units prior to the opening of trading on March 17, 2023. The deregistration will become effective 10 days from the filing of the Form 25, which occurred on March 16, 2023. Summit intends to file a Form 15 with the SEC in order to complete the deregistration of Summit's securities under the Exchange Act.

Item 3.03 Material Modifications to Rights of Security Holders.

To the extent required by Item 3.03 of Form 8-K, the disclosure set forth in the Introductory Note, Item 2.01 and Item 3.01 above and Item 5.01 below of this Current Report on Form 8-K is incorporated by reference in this Item 3.03.

Item 5.01 Changes in Control of Registrant.

To the extent required by Item 5.01 of Form 8-K, the disclosure set forth in the Introductory Note and Item 2.01 of this Current Report on Form 8-K is incorporated by reference in this Item 5.01.

As a result of the consummation of the Business Combination, a change in control of Summit occurred. At the First Merger Effective Time, all the property, rights, privileges, agreements, powers and franchises, debts, liabilities, duties and obligations of Merger Sub I and Summit became the property, rights, privileges, agreements, powers and franchises, debts, liabilities, duties and obligations of the Surviving Entity, which included the assumption by the Surviving Entity of any and all agreements, covenants, duties and obligations of Merger Sub I and Summit set forth in the Business Combination Agreement to be performed after the First Merger Effective Time. At the Second Merger Effective Time, all the property, rights, privileges, agreements, powers and franchises, debts, liabilities, duties and obligations of the Surviving Entity and Merger Sub II became the property, rights, privileges, agreements, powers and franchises, debts, liabilities, duties and obligations of the Surviving Company, which included the assumption by the Surviving Company of any and all agreements, covenants, duties and obligations of the Surviving Entity and Merger Sub II set forth in the Business Combination Agreement to be performed after the Second Merger Effective Time.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

In accordance with the Business Combination Agreement, Summit merged with Merger Sub II and upon the Second Merger Effective Time, Summit ceased to exist and each of Summit's officers and directors forthwith ceased to serve as an officer or director of Summit, including each of Bo Tan, Ken Poon, Ian Stone, Thomas Folinsbee and Tao Bai ceased to be a director of Summit, Bo Tan resigned as Chief Executive Officer, Co-Chief Investment Officer and Ken Poon resigned as President, Co-Chief Investment Officer. These resignations were not due to any disagreement between Summit and the officers and directors on any matter relating to Summit's operation, policies and practice. In the meanwhile, Mr. Yi Zhang, the chairman and director of YS Biopharma will serve as the sole director of Merger Sub II, the surviving entity after the Second Merger.

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