Jiangsu Tiannai Technology Co., Ltd. Announcement on Convertible Bond Conversion Results and Share Changes

Security Code: 688116 Security Abbreviation: Tianna Technology Announcement No.: 2026-026 Conversion Bond Code: 118005 Bond Abbreviation: Tianna Convertible Bonds

Announcement of Jiangsu Tianna Technology Co., Ltd. on the Results of the Conversion of the Convertible Bonds into Shares and Changes in Share Capital

The board of directors and all directors of this company hereby guarantee that the contents of this announcement contain no false records, misleading statements, or material omissions, and assume legal responsibility for the authenticity, accuracy, and completeness of the contents of this announcement in accordance with the law.

Key Matters:

● Conversion status in this quarter: Jiangsu Tianna Technology Co., Ltd. (hereinafter referred to as the “Company” or “Tianna Technology”)’s convertible corporate bonds “Tianna Convertible Bonds” issued to non-specific investors commenced conversion on August 9, 2022. From January 1, 2026 to March 31, 2026, a total of RMB 1,000 have been converted into the Company’s shares, with a conversion quantity of 10 shares, representing 0.000004% of the Company’s total issued share capital prior to the conversion of “Tianna Convertible Bonds.”

● Cumulative conversion status: As of March 31, 2026, a total of RMB 66,000 of “Tianna Convertible Bonds” have been converted into the Company’s shares, with a conversion quantity of 627 shares, representing 0.000270% of the Company’s total issued share capital prior to the conversion of “Tianna Convertible Bonds.”

● Outstanding convertible bonds not yet converted: As of March 31, 2026, the amount of convertible bonds under “Tianna Convertible Bonds” that have not yet been converted is RMB 829,934,000, representing 99.9920% of the total issue amount of “Tianna Convertible Bonds.”

I. Issuance and Listing of the Convertible Bonds

Approved by the China Securities Regulatory Commission (CSRC) for registration pursuant to Document No. [2021] 3679, the Company issued 8.30 million convertible corporate bonds to non-specific investors on January 27, 2022. Each bond had a par value of RMB 100, and the total issuance amount was RMB 830.00 million. The term of the convertible corporate bonds issued in this offering is six years from the date of issuance, i.e., from January 27, 2022 to January 26, 2028.

Approved by the Shanghai Stock Exchange under its self-regulatory decision letter No. [2022] 48, the Company’s convertible corporate bonds with an issuance amount of RMB 830.00 million were listed and began trading on the Shanghai Stock Exchange starting March 1, 2022. The bond abbreviation is “Tianna Convertible Bonds,” and the bond code is “118005.”

Pursuant to relevant regulations and the terms of the “Securities Offering Memorandum for Convertible Corporate Bonds Issued to Non-Specific Investors by Jiangsu Tianna Technology Co., Ltd.,” the Company’s convertible corporate bonds “Tianna Convertible Bonds” are convertible into the Company’s shares starting August 9, 2022. The conversion period is from August 9, 2022 to January 26, 2028. The initial conversion price of “Tianna Convertible Bonds” is RMB 153.67 per share. Due to the Company’s implementation of the 2021 annual equity distribution plan, starting July 5, 2022, the conversion price of “Tianna Convertible Bonds” was adjusted from RMB 153.67 per share to RMB 153.60 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds) in Connection with the 2021 Annual Equity Distribution,” published on June 25, 2022 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2022-040).

Because the share registration for the first fulfillment period under the reserved portion of the 2020 restricted stock incentive plan and the first fulfillment period under the initial grant portion were completed, effective December 21, 2022, the conversion price was adjusted from RMB 153.60 per share to RMB 153.43 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on December 20, 2022 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2022-089).

Due to the Company’s implementation of the 2022 annual equity distribution plan, starting July 7, 2023, the conversion price of “Tianna Convertible Bonds” was adjusted from RMB 153.43 per share to RMB 103.80 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds) in Connection with the 2022 Annual Equity Distribution,” published on June 30, 2023 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2023-054).

Because the share registration for the second fulfillment of the second fulfillment period under the initial grant portion of the 2020 restricted stock incentive plan was completed, starting September 28, 2023, the conversion price was adjusted from RMB 103.80 per share to RMB 103.75 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on September 27, 2023 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2023-080).

Due to the completion of share registration for the third fulfillment period under the initial grant portion and the second fulfillment period under the reserved grant portion under the 2020 restricted stock incentive plan, and also for the first fulfillment period under the initial grant portion and the first fulfillment period under the reserved grant portion under the 2022 restricted stock incentive plan, starting January 17, 2024, the conversion price was adjusted from RMB 103.75 per share to RMB 103.52 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on January 16, 2024 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2024-003).

Due to the Company’s implementation of the 2023 annual equity distribution plan, starting June 27, 2024, the conversion price of “Tianna Convertible Bonds” was adjusted from RMB 103.52 per share to RMB 103.22 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Implementing the 2023 Annual Equity Distribution and Adjusting the Conversion Price of ‘Tianna Convertible Bonds,’” published on June 20, 2024 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2024-045).

Because the share registration for the third fulfillment period under the reserved portion of the 2020 restricted stock incentive plan and the share registration for the second fulfillment period under the initial grant portion and the reserved portion under the 2022 restricted stock incentive plan was completed, starting December 9, 2024, the conversion price was adjusted from RMB 103.22 per share to RMB 103.18 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on December 6, 2024 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2024-070).

Because the Company’s issuance to specific targets of additional 21,674,342 shares was completed and the share registration procedures were finalized on May 14, 2025 with the Shanghai branch of China Securities Depository and Clearing Co., Ltd., the conversion price was adjusted from RMB 103.18 per share to RMB 99.26 per share effective May 21, 2025. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on May 20, 2025 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2025-040).

Due to the Company’s implementation of the 2024 annual equity distribution plan, starting June 30, 2024, the conversion price of “Tianna Convertible Bonds” was adjusted from RMB 99.26 per share to RMB 99.11 per share. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Implementing the 2024 Annual Equity Distribution and Adjusting the Conversion Price of ‘Tianna Convertible Bonds,’” published on June 21, 2025 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2025-051).

Because the share registration for the third fulfillment period under the initial grant portion of the 2022 restricted stock incentive plan was completed, the conversion price was adjusted from RMB 99.11 per share to RMB 99.09 per share effective October 16, 2025. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement of Adjusting the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds) and the Resumption of Trading in Connection with Conversion,” published on October 15, 2025 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2025-078).

Because the share registration for the third fulfillment period under the reserved portion of the 2022 restricted stock incentive plan was completed, and after calculation, the conversion price of “Tianna Convertible Bonds” remained unchanged upon the completion of the fulfillment registration under the aforesaid restricted stock incentive plan. For details, please refer to the Company’s announcement titled “Jiangsu Tianna Technology Co., Ltd. on the Announcement that the Fulfillment of This Restricted Stock Will Not Adjust the Conversion Price of Convertible Corporate Bonds (Tianna Convertible Bonds),” published on November 22, 2025 on the website of the Shanghai Stock Exchange (www.sse.com.cn) (Announcement No.: 2025-086).

II. Conversion Status of the Convertible Bonds This Time

The conversion period of the convertible corporate bonds “Tianna Convertible Bonds” issued by the Company to non-specific investors is from August 9, 2022 to January 26, 2028. From January 1, 2026 to March 31, 2026, a total of RMB 1,000 have been converted into the Company’s shares, with a conversion quantity of 10 shares, representing 0.000004% of the Company’s total issued share capital prior to the conversion of “Tianna Convertible Bonds.”

As of March 31, 2026, the amount of convertible bonds under “Tianna Convertible Bonds” that have not yet been converted is RMB 829,934,000, representing 99.9920% of the total issue amount of “Tianna Convertible Bonds.”

III. Changes in Share Capital

Unit: shares

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IV. Other

Investors who require detailed information about “Tianna Convertible Bonds” should refer to the “Securities Offering Memorandum for Convertible Corporate Bonds Issued to Non-Specific Investors by Jiangsu Tianna Technology Co., Ltd.” disclosed by the Company on January 25, 2022 on the website of the Shanghai Stock Exchange (www.sse.com.cn).

Contact department: Securities Department

Contact phone: 0519-81582868

Contact email: stock@cnanotechnology.com

This announcement is hereby made.

Board of Directors of Jiangsu Tianna Technology Co., Ltd.

April 2, 2026

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