A share code: 688981 A share abbreviation: SMIC Announcement No.: 2025-007

Hong Kong stock code: 00981 Hong Kong stock abbreviation: SMIC

Xinxin (Hong Kong) Investment Co., Ltd

Regarding the change in the equity interest held by SMIC

Indicative announcements

Xinxin (Hong Kong) Investment Co., Ltd., the information disclosure obligor, guarantees that there is no false record, misleading statement or material omission in the content of this announcement, and assumes legal responsibility for the truthfulness, accuracy and completeness of its content in accordance with the law.

Important Content Notes:

Xinxin (Hong Kong) Investment Co., Ltd. (hereinafter referred to as "Xinxin Hong Kong") is integrated by SMIC

Circuit Manufacturing Co., Ltd. (hereinafter referred to as the "Company") is a shareholder holding more than 5% of the shares. Before this equity change, Xinxin Hong Kong held 562,537,594 Hong Kong shares of the company, accounting for 7.05% of the company's total share capital; After the completion of this equity change, Xinxin Hong Kong holds 551,237,594 Hong Kong shares of the company, accounting for 6.91% of the company's total share capital.

This change in equity will not affect the tender offer, nor will it lead to the company having no controlling shareholder and no actual control

The state of control has changed.

1. The basic situation of the change in rights and interests

1. Basic information of the information disclosure obligor

Information Disclosure Name Xinxin (Hong Kong) Investment Co., Ltd

Obligor Residence: 31st Floor, Tower 2, Times Square, Causeway Bay, Hong Kong Special Administrative Region

2. Changes in the rights and interests

Name of shareholder Date of change Method of change Share Number of change Proportion of change

Type (Shares)

Xinxin Hong Kong 28 Mar 2025 Call Auction HK Stocks 11,300,000 0.14%

3. Before and after the change in equity, the shareholding of the information disclosure obligor:

Before the change in equity After the change in equity

Name of shareholder Number of shares held in total share capital Number of shares held in total share capital

(Hong Kong stocks) ratio (Hong Kong stocks) ratio

Xinxin Hong Kong 562,537,594 7.05% 551,237,594 6.91%

Note: If there is any discrepancy in the above data, it is due to rounding to two decimal places.

2. Follow-up matters involved in this change in equity

This change in equity does not affect the tender offer, does not involve the disclosure of the report on the change in equity by the information disclosure obligor, and will not lead to a change in the status of the company without a controlling shareholder or actual controller.

The announcement is hereby made.

Information disclosure obligor: Xinxin (Hong Kong) Investment Co., Ltd

April 1, 2025