Securities code: 688116 Securities abbreviation: Tiannai Technology Announcement No.: 2025-022

Convertible bond code: 118005 Convertible bond abbreviation: Tiannai convertible bond

Jiangsu Tiannai Technology Co., Ltd

Regarding the increase in the shareholding of the company's shares by one of the actual controllers and senior managers

Voluntary Disclosure Announcement

The Board of Directors and all directors of the Company guarantee that the content of this announcement does not contain any false records or misleading

statements or material omissions, and bear legal responsibility for the authenticity, accuracy and completeness of its content in accordance with the law.

Jiangsu Tiannai Technology Co., Ltd. (hereinafter referred to as the "Company") received the Company on April 7, 2025

Mr. Cai Yongluo, one of the actual controllers, director, deputy general manager, secretary of the board of directors and chief financial officer, informed that based on the recognition of the company's investment value and confidence in the company's sustainable and stable development in the future, the above-mentioned persons increased their holdings of the company's shares by a total of 5,000 shares through centralized bidding through the securities trading system of the Shanghai Stock Exchange on April 7, 2025, with a total increase of RMB 173,185. The increase in shares is hereby announced as follows:

1. The basic situation of the main body of this increase

(1) The main body of the increase in holdings: Mr. Cai Yongluo, one of the actual controllers, director, deputy general manager, secretary of the board of directors and person in charge of finance.

(2) The number and proportion of shares held before the increase:

Prior to this increase, Mr. Cai Yongliu directly held 81,400 shares of the company, accounting for 0.02% of the company's total share capital.

Second, the increase in holdings

1. The purpose of this increase is based on the confidence in the company's future development and the recognition of long-term investment value.

2. The time of this increase: April 7, 2025

3. The method of this increase: centralized bidding transaction method of the Shanghai Stock Exchange trading system

4. The source of funds for this increase in shares: own funds

5. The specific situation of this increase

Name Number of additional holdings Average transaction price Total transaction amount Directly held after this increase Directly held after this increase

(Shares) (RMB/share) Amount (RMB) The number of shares of the company is the proportion of the company's shares

(Shares) (%)

Cai Yongluo 5,000 34.64 173,185 86,400 0.03

Note: The data in the above table is rounded to two decimal places

3. Other matters

1. This increase is in line with the Company Law of the People's Republic of China, the Securities Law of the People's Republic of China and the Listing Law

Measures for the Administration of Corporate Acquisitions, "Management of the Company's Shares Held by Directors and Senior Managers of Listed Companies and Their Changes".

Rules" and other relevant provisions of laws and regulations will not lead to the company's equity distribution not meeting the listing conditions and will not be affected

The listing status of the company will not lead to a change in the controlling shareholder and actual controller of the company.

2. The above-mentioned entities will strictly abide by the China Securities Regulatory Commission and the Shanghai Stock Exchange

It is stipulated that no insider trading and short-term trading shall be conducted, and no trading of the company's shares shall be carried out during the sensitive period, within the statutory period

Do not reduce the company's shares.

3. The above-mentioned shareholding subject has no other plans to increase its holdings of the company's shares, and will continue to increase its holdings if it is planned to further increase its holdings in the future

Continue to strictly abide by the relevant regulations of the China Securities Regulatory Commission and the Shanghai Stock Exchange and fulfill the relevant regulations in a timely manner

Disclosure of Disclosure.

The announcement is hereby made.

Board of Directors of Jiangsu Tiannai Technology Co., Ltd

April 8, 2025