Zhenlan Instruments: Zheng Hong and Cai Yan respectively increased their holdings by 104.81 million yuan and 13.18 million yuan.

Zhenlan Instrument Announcement: Shareholders Zheng Hong and Cai Yan increased their holdings of the company's shares through centralized bidding on March 6, 2026. They respectively used their own funds of 104,810 yuan and 13,180 yuan to buy 65,100 shares and 8,100 shares at an average price of about 16.1 yuan per share and 16.27 yuan per share. After the increase, Zheng Hong holds 13.8068 million shares, accounting for 3.38%; Cai Yan holds 7.4143 million shares, accounting for 1.81%; together with the concerted action parties, they hold a total of 154 million shares, accounting for 37.67%.