Promissory Note, dated March 25, 2025, issued by FutureTech II Acquisition Corp. to FutureTech Partners II, LLC

Exhibit 10.1

THIS PROMISSORY NOTE (“NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

PROMISSORY NOTE

FutureTech II Acquisition Corp., a Delaware corporation and blank check company (the “Maker” or the “Company”), promises to pay to the order of FutureTech Partners II LLC or its registered assigns or successors in interest (the “Payee” or the “Sponsor”), or order, the principal sum of up to One Million Five Hundred Thousand Dollars ($1,500,000) in lawful money of the United States of America, on the terms and conditions described below. All payments on this Note shall be made by check or wire transfer of immediately available funds or as otherwise determined by the Maker to such account as the Payee may from time to time designate by written notice in accordance with the provisions of this Note.

RECITALS

WHEREAS, the Sponsor has agreed to loan the Company funds in order to finance the Company’s expenses related to and arising from the initial business combination with Longevity Biomedical Inc and other parties thereto (the “Business Combination”) and Company’s other ongoing operating expenses (collectively, the “Working Capital Loans,” which do not include the Extension Loans related to extension of business combination period of the Company);

WHEREAS, since October 2024, upon the Company’s requests, the Sponsor loaned the Company funds from time to time to cover the Company’s operating costs; and

WHEREAS, the Company continues to require additional capital to fund the operating expenses and expenses related to Business Combination until closing, and in order to induce the Sponsor to continue to make Working Capital Loans to fund the Company’s such expenses, the Company is willing to issue this Promissory Note.

NOW, THEREFORE, in consideration of the foregoing and the mutual representations, warranties, covenants, agreements and conditions set forth herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows:

1. Principal. The principal balance of this Note shall be payable by the Maker on the earlier of (i) August 18, 2025 or (ii) the date on which Maker consummates the Business Combination. The principal balance may be prepaid at any time. The principal balance shall be payable by the Maker either: (i) in cash, or (ii) in Maker’s private placement units, (the “Private Units”, each Private Unit consisting of one share of Class A common stock of the Company, par value $0.0001 per share (the “Shares”), and one warrant (the “Warrants”, together with the Shares, the “Securities”) with each whole warrant entitling its holder to purchase one (1) share of Class A Common Stock), $10.00 per unit, at the Payee’s election in writing. Payee may elect to convert any outstanding principal balance into Private Units, at any time when this Note remains outstanding, at a fixed conversion price of $10.00 per unit.

2. Interest. No interest shall accrue on the unpaid principal balance of this Note.

3. Forgiveness. The Note will be forgiven by the Payee if the Maker is unable to consummate the Business Combination by August 18, 2025, except to the extent of any funds held outside of the trust account (the “Trust Account”) maintained with Continental Stock Transfer & Trust Company (“CST”) pursuant to an investment management trust agreement between the Maker and CST.

4. Drawdown Requests. Maker and Payee agree that Maker may request up to One Million Five Hundred Thousand Dollars ($1,500,000) for costs and expenses reasonably related to Maker’s Business Combination and operation. The principal of this Note may be drawn down from time to time prior to the date on which Maker consummates the Business Combination, upon written request from Maker to Payee (each, a “Drawdown Request”). The maximum amount of drawdowns collectively under this Note is One Million Five Hundred Thousand Dollars ($1,500,000). Once an amount is drawn down under this Note, it shall not be available for future Drawdown Requests even if prepaid. No fees, payments or other amounts shall be due to Payee in connection with, or as a result of, any Drawdown Request by Maker. Notwithstanding the foregoing, all payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable attorneys’ fees, and then to the reduction of the unpaid principal balance of this Note.

5. Registration Rights. The Company represents, warrants and agrees that with respect to the Securities, the Payee will have the following registration rights: (i) one demand registration of the sale of the Securities at the Company’s expense, and (ii) unlimited “piggyback” registration rights for a period of five (5) years after the closing of the Company’s Business Combination at the Company’s expense.

6. Application of Payments. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation) reasonable attorneys’ fees, then to the payment in full of any late charges and finally to the reduction of the unpaid principal balance of this Note.

7. Events of Default. The following shall constitute an event of default (“Event of Default”):

(a) Failure to Make Required Payments. Failure by Maker to pay the Principal Amount due pursuant to this Note within five (5) business days from the closing of the Business Combination.

(b) Voluntary Bankruptcy, Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action by Maker in furtherance of any of the foregoing.

(c) Involuntary Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in an involuntary case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee, custodian, trustee, sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive days.

8. Remedies.

(a) Upon the occurrence of an Event of Default specified in Section 7(a) hereof, Payee may, by written notice to Maker, declare this Note to be due immediately and payable, whereupon the unpaid Principal Amount of this Note, and all other amounts payable hereunder, shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly waived, anything contained herein or in the documents evidencing the same to the contrary notwithstanding.

(b) Upon the occurrence of an Event of Default specified in Sections 7(b) and 7(c), the unpaid principal balance of this Note, and all other sums payable with regard to this Note, shall automatically and immediately become due and payable, in all cases without any action on the part of Payee.

9. Waivers. Maker and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest, and notice of protest with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the terms of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any property, real or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or providing for any stay of execution, exemption from civil process, or extension of time for payment; and Maker agrees that any real estate that may be levied upon pursuant to a judgment obtained by virtue hereof or any writ of execution issued hereon, may be sold upon any such writ in whole or in part in any order desired by Payee.

10. Unconditional Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement of the payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party, and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or consented to by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the payment or other provisions of this Note, and agrees that additional makers, endorsers, guarantors, or sureties may become parties hereto without notice to Maker or affecting Maker’s liability hereunder.

11. Notices. All notices, statements or other documents which are required or contemplated by this Note shall be made in writing and delivered: (i) personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in writing, (ii) by facsimile to the number most recently provided to such party or such other address or fax number as may be designated in writing by such party or (iii) by electronic mail, to the electronic mail address most recently provided to such party or such other electronic mail address as may be designated in writing by such party. Any notice or other communication so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt of written confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent by mail.

12. Construction. THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW PROVISIONS THEREOF. The Parties irrevocably submits to the exclusive jurisdiction of any New York State or United States Federal court sitting in The City of New York, Borough of Manhattan, over any suit, action or proceeding arising out of or relating to this Note. The Parties irrevocably waive, to the fullest extent permitted by law, any objection that they may now or hereafter have to the laying of venue of any such suit, action or proceeding brought in such a court and any claim that any such suit, action or proceeding brought in such a court has been brought in an inconvenient forum.

13. Severability. Any provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.

14. Trust Waiver. Notwithstanding anything herein to the contrary, the Payee hereby waives any and all right, title, interest or claim of any kind (“Claim”) in or to any distribution of or from the Trust Account of the Maker in which the proceeds of the initial public offering (the “IPO”) (including the deferred underwriters discounts) are deposited, as described in greater detail in the registration statement and prospectus filed with the Securities and Exchange Commission in connection with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the Trust Account for any reason whatsoever.

15. Amendment; Waiver. Any amendment hereto or waiver of any provision hereof may be made with, and only with, the written consent of the Maker and the Payee.

16. Assignment. No assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or otherwise) without the prior written consent of the other party hereto and any attempted assignment without the required consent shall be void.

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IN WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused this Note to be duly executed by the undersigned as of the day and year first above written.