Exhibit 3.1

FOURTH CERTIFICATE OF AMENDMENT

TO THE

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

FUTURETECH II ACQUISITION CORP.

August 15, 2025

FutureTech II Acquisition Corp., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS:

1. The name of the Corporation is “FutureTech II Acquisition Corp.”. The original certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on August 19, 2021 (the “Original Certificate”). The Amended and Restated Certificate of Incorporation was filed with the Secretary of State of the State of Delaware on February 17, 2022 (as amended, the “Amended and Restated Certificate”). On November 21, 2024, the Company filed an Certificate of Amendment to the Amended and Restated Certificate (as amended, the “Amendment”).

2. This Amendment amends the Amended and Restated Certificate.

3. This Amendment was duly adopted by the Board of Directors of the Corporation and the stockholders of the Corporation in accordance with Section 242 of the General Corporation Law of the State of Delaware.

Item 4 of this Amendment to the Amended and Restated Certificate of Incorporation was duly adopted by the affirmative vote of at least sixty-five percent (65%) of the outstanding shares of Class A Common Stock.

4. The text of Section 9.1(b) is hereby amended and restated to read in full as follows:

9.1(b) Immediately after the Offering, a certain amount of the net offering proceeds received by the Corporation in the Offering (including the proceeds of any exercise of the underwriters’ over-allotment option) and certain other amounts specified in the Corporation’s registration statement on Form S-1, as initially filed with the Securities and Exchange Commission (the “SEC”) on December 23, 2021, as amended (the “Registration Statement”), was deposited in a trust account (the “Trust Account”), established for the benefit of the Public Stockholders (as defined below) pursuant to a trust agreement described in the Registration Statement. Except for the withdrawal of interest income (if any) to pay the Corporation’s taxes, if any, none of the funds held in the Trust Account (including the interest earned on the funds held in the Trust Account) will be released from the Trust Account until the earliest to occur of (i) the completion of the initial Business Combination, (ii) the redemption of 100% of the Offering Shares (as defined below) if the

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Corporation does not complete its initial Business Combination by August 18, 2025; provided that the Company may extend such date by up to an additional nine months, to up to August 18, 2026, provided that FutureTech II Partners LLC (or its affiliates or permitted designees) will deposit into the Trust Account the lesser of: (i) $25,000 and (ii) an aggregate amount equal to $0.033 multiplied by the number of public shares of the Company that are not redeemed in connection with the stockholder vote to approve the Charter Amendment Proposal for each such one-month extension, unless the closing of the Corporation’s Business Combination shall have occurred, for such extension in exchange for a non-interest bearing, unsecured promissory note payable upon consummation of a Business Combination, or such earlier date as determined by the Board (as applicable, the “Termination Date”), subject to applicable law, and (iii) the redemption of Offering Shares in connection with a stockholder vote to approve an amendment to this Amended and Restated Certificate (A) to modify the substance or timing of the Corporation’s obligation to redeem 100% of the Offering Shares if the Corporation has not completed an initial Business Combination by the Termination Date or (B) with respect to any other provisions relating to stockholders’ rights or pre-initial Business Combination activity (as described in Section 9.7). Holders of shares of the Common Stock included as part of the units sold in the Offering (the “Offering Shares”) (whether such Offering Shares were purchased in the Offering or in the secondary market following the Offering and whether or not such holders are FutureTech II Partners LLC (the “Sponsor”) or the officers or directors of the Corporation, or any affiliates of any of the foregoing) are referred to herein as “Public Stockholders.”

IN WITNESS WHEREOF, FutureTech II Acquisition Corp. has caused this Certificate of Amendment to the Amended and Restated Certificate to be duly executed in its name and on its behalf by an authorized officer as of the date first set above.

	FUTURETECH II ACQUISITION CORP.

	By:	/s/ Ray Chen
	Name:	Ray Chen
	Title:	Chief Executive Officer

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FutureTech II Acquisition Corp. 8-K