-- Announcement on Attending 2025 Online Collective Reception Day for Investors of Listed Companies in Chongqing Jurisdiction and Semi-Annual Performance Briefing

Securities code: 603976 Securities abbreviation: Zhengchuan Shares Announcement number: 2025-058 Bond code: 113624 Bond abbreviation: Zhengchuan Convertible Bonds

Chongqing Zhengchuan Pharmaceutical Packaging Materials Co., Ltd.

About participating in the 2025 Investor Online for Listed Companies in Chongqing

Announcement of collective reception day and semi-annual performance briefing event

The company's board of directors and all directors guarantee that the contents of this announcement do not contain any false records, misleading statements or major omissions, and assume legal responsibility for the authenticity, accuracy and completeness of its contents.

In order to further improve the investor relations management level of listed companies in the jurisdiction, promote the improvement of corporate governance, and assist the high-quality development of listed companies, under the guidance of the Chongqing Securities Regulatory Bureau, the Chongqing Listed Companies Association and Shenzhen Panorama Network Co., Ltd. organized the "2025 Investor Online Collective Reception Day and Semi-annual Performance Briefing Event for Listed Companies in Chongqing Region".

This event will be held from 15:00-17:00 on September 25, 2025 (Thursday). Investors can log in to the "Panorama Roadshow" platform (https://rs.p5w.net/) to participate in this event.

At that time, relevant senior managers of the company will participate in this event and conduct "one-to-many" online communications with investors on issues of concern to investors through online communication. Investors are welcome to participate!

Announcement is hereby made.

Board of Directors of Chongqing Zhengchuan Pharmaceutical Packaging Materials Co., Ltd.

September 20, 2025