Aggregate reduction: when the holding period of a shareholder with more than 5% of the shares expires, the shareholder has reduced their shareholding by 2.47% in total.

Huisheng Vacuum announced that the shareholder Nanshan Jiaqiao's reduction plan from August 7, 2025 to November 6, 2025 has been completed. Through block trading and centralized competitive bidding, they have reduced a total of 2.4716 million shares, accounting for 2.47% of the total share capital, at a price range of 154.45 yuan/share to 194.97 yuan/share. After the reduction, Nanshan Jiaqiao's holding has decreased to 3.8162 million shares, accounting for 3.82% of the total share capital. This reduction complies with relevant regulations, has not resulted in changes to the company's controlling shareholder or actual controller, and does not affect the company's governance structure and ongoing operations.