Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * Li Mingyu 2. Issuer Name and Ticker or Trading Symbol Horizon Space Acquisition II Corp. [HSPT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O HORIZON SPACE ACQUISITION II CORP., 1412 BROADWAY, 21ST FLOOR, SUITE 21V 3. Date of Earliest Transaction (Month/Day/Year) 06/12-05:00/2026 (Street) NEW YORK, NY 10018 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Li Mingyu C/O HORIZON SPACE ACQUISITION II CORP. 1412 BROADWAY, 21ST FLOOR, SUITE 21V NEW YORK, NY 10018	X	X	Chief Executive Officer

Signatures

/s/ Mingyu Li		06/17/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Remarks: Horizon Space Acquisition II Sponsor Corp. (the "Sponsor") was the record holder of certain securities of Horizon Space Acquisition II Corp. ("HSPT"). Mr. Mingyu Li beneficially owns 50% issued and outstanding shares of the Sponsor. In accordance with the governing documents of the Sponsor, Mr. Mingyu Li is the sole director of the Sponsor and deemed to have the voting and dispositive rights over the securities of HSPT held by the Sponsor. This "Exit" Form 4 is voluntarily filed to report that, in connection with the consummation of the initial business combination of HSPT on June 12, 2026 pursuant to the Business Combination Agreement dated May 9, 2025 by and among HSPT, SL Science Holding Limited, a Cayman Islands exempted company limited by shares, SL BIO Ltd., a Cayman Islands exempted company limited by shares, CW Mega Limited, a Cayman Islands exempted company limited by shares, and WW Century Limited, a Cayman Islands exempted company limited by shares, (i) the Reporting Person no longer served as a director or officer of HSPT or held more than 10% of the issued and outstanding ordinary shares of HSPT after June 12, 2026, and therefore is no longer subject to Section 16 reporting, and (ii) the Sponsor no longer held more than 10% of the issued and outstanding ordinary shares of HSPT after June 12, 2026, and therefore is no longer subject to Section 16 reporting.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.