Announcement on the Company's Use of Idle Own Funds for Cash Management in 2026

Securities Code: 301665 Securities Abbreviation: Taihe Shares Announcement No.: 2026-017 Nantong Taihe Chemical Co., Ltd. Announcement on the Company's Use of Idle Own Funds for Cash Management in 2026 The Company and the Board of Directors guarantee that the information disclosed is true, accurate, and complete, and contains no false records, misleading statements, or major omissions. Nantong Taihe Chemical Co., Ltd. (hereinafter referred to as the "Company") held the seventh meeting of the fourth Board of Directors on April 23, 2026, and deliberated and passed the "Proposal on the Company's Use of Idle Own Funds for Cash Management in 2026". It was agreed that the Company and its holding subsidiaries would use idle own funds not exceeding RMB 1 billion (inclusive) for cash management, provided that the normal operations of the Company are not affected. The term of use is 12 months from the date of deliberation and approval by the Board of Directors, and can be rolled over. The first meeting of the independent directors' special committee of the fourth Board of Directors of the Company in 2026 issued a clear approval opinion. This cash management matter using idle own funds is within the scope of the Board of Directors' approval authority and does not need to be submitted to the Company's shareholders' meeting for deliberation. The specific situation is hereby announced as follows: I. Basic Situation of the Proposed Use of Idle Own Funds for Cash Management To improve the efficiency of the Company's capital utilization and reasonably utilize idle funds, the Company plans to use idle own funds for cash management, provided that the normal operations of the Company are not affected. The specific situation is as follows: (I) Investment Objective To improve the efficiency of own fund utilization and reasonably utilize idle own funds; to obtain a certain investment return while ensuring the daily operating capital needs of the Company and its holding subsidiaries. (II) Investment Products The Company and its holding subsidiaries will strictly control risks in accordance with relevant regulations and rigorously evaluate wealth management products. Investment products with high safety, good liquidity, controllable risks, and a maximum investment term of no more than 12 months will be selected, including but not limited to structured deposits, large-denomination certificates of deposit, and other high-security products. This will not affect the use of funds required for the Company's normal operations. Purchase channels include but are not limited to banks, securities companies, and trust companies. The types of products purchased do not involve securities investment, entrusted wealth management, and derivative trading, which are risk investment products stipulated in the "Guidelines for the Standardized Operation of Listed Companies on the Growth Enterprise Market of the Shenzhen Stock Exchange". (III) Investment Quota and Term The Company and its holding subsidiaries plan to use idle own funds for cash management with a maximum amount not exceeding RMB 1 billion (inclusive). The term of use is 12 months from the date of deliberation and approval by the Board of Directors. Within the above quota and term, funds can be used in a rolling manner. (IV) Implementation Method The Company plans to authorize the Company's management to be r