Summit Healthcare Acquisition Corp.

admitted from the HISTORICAL census (EDGAR's SIC 6770 registrant list, walked in full: 3,325 registrants, 1,167 of which ever priced an IPO). The live discovery job cannot reach this registrant — it reads the filing tape, and this one stopped filing. Admission rule: src/lib/universe-admit.ts. SIC 6770 (Blank Checks); 424B 0001193125-21-187812 priced 2021-06-10; common ticker SMIH off 8-K 0001104659-23-032354 (2023-03-14); lifecycle EXITED. Ending PROVEN, not inferred: CLOSED per Form 25 0001354457-23-000187 (2023-03-16) — Form 25 filed under 17 CFR 240.12d2-2(a)(3) — the rule for securities that "have come to evidence other securities in substitution therefor", i.e. the shares became the successor's (class: Class A Ordinary Share, Warrant, Unit). ipoSizeM and deadline left NULL: gross-proceeds prose conflates the over-allotment with the offering, and a charter deadline belonging to a vehicle that has ended is a date nobody can act on. ipoDate is the 424B pricing date.

warrantStrike=11.5, unitSeparationDays=52 from the definitive prospectus (0001193125-21-187812). NOT FILLED: warrantCallPrice — no stated candidate; rightShareRatio — no stated candidate

sponsor "Summit Healthcare Acquisition Sponsor LLC" sourced from prospectus definition (10-K) acc 0001193125-22-091035.

[CLOSED-2.01] SEC accession 0001104659-23-033374 (Form 8-K, item 2.01 Completion of Acquisition or Disposition of Assets); the cover's date of earliest event reported is 2023-03-16. That is the SEC's own date for this report and NOT necessarily the closing day — an 8-K may cover several events, and where the two differ the closing date is in the quoted sentence below. Target read STRUCTURALLY from the merger agreement's party list — the party that is neither the registrant (identified by the filing's own cover page) nor a merger sub (identified by the clause making it a subsidiary of another party) nor an accommodation party (identified by a "solely for purposes of" joinder), and it was the only one left. The sentence it was read from: "¨ Introductory Note As previously disclosed, on September 29, 2022, Summit Healthcare Acquisition Corp., an exempted company incorporated with limited liability under the laws of Cayman Islands ("Summit") entered into a business combination agreement (the "Business Combination Agreement") with YishengBio Co., Ltd, an exempted company limited by shares incorporated under the laws of the Cayman Islands (to be renamed as YS Biopharma Co., Ltd., herein referred to as "YS Biopharma"), Oceanview Bioscience Acquisition Co., Ltd., an exempted company limited by shares incorporated under the laws of the Cayman Islands and a direct wholly-owned subsidiary of YS Biopharma ("Merger Sub I") and Hudson Biomedical Group Co., Ltd., an exempted company limited by shares incorporated under the laws of the Cayman Islands and a direct wholly-owned subsidiary of YS Biopharma ("Merger Sub II," and together wi" No deal value is set — an item-2.01 heading is not a figure. No date column is set: Deal has announcedAt, voteDate and expectedCloseAt and nowhere to record an actual close, so the SEC's date is kept here until that column exists. [DEAL-STRUCTURE-MINED] pipeSizeM=30 from primary filings (0001104659-23-012173).

entity created from the filed target name; no About paragraph on file, so every other field awaits a sourced read

pipeBasis set to UNSOURCED: the size came from the research seed / an earlier record and no filing we hold states it — surfaces now label it "unsourced"; an LLM re-read to FILED replaces this when credits allow

OTHER -> BIOTECH, on 8-K 0001104659-23-033374: "YishengBio Co., Ltd, an exempted company limited by shares incorporated under the laws of the Cayman Islands (to be renamed as YS Biopharma Co., Ltd., herein re"