A share code: 688981 A share abbreviation: SMIC Announcement No.: 2025-001

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

Semiconductor Manufacturing International Corporation (SMIC).

Announcement on the convening of the 2024 Fourth Quarter Results Briefing

The board of directors and all directors of the company guarantee that there are no false records, misleading statements or material omissions in the content of this announcement, and assume legal responsibility for the authenticity, accuracy and completeness of its content in accordance with the law.

Important Notes:

Meeting time: 8:30-9:30 a.m. on Wednesday, February 12, 2025

Meeting method: web/teleconference

1. Type of briefing

Semiconductor Manufacturing International Corporation (the "Company") will disclose its results for the fourth quarter of 2024 after the trading hours on February 11, 2025, which can be found on the website of the Shanghai Stock Exchange (http://www.sse.com.cn/) and the website of the Hong Kong Stock Exchange (https://www.hkex.com.hk/).

In order to facilitate investors to have a more comprehensive understanding of the specific situation of the company's operating performance, the company intends to hold the "2024 Fourth Quarter Results Briefing" on February 12, 2025.

2. The time and place of the briefing

The briefing session will be held on Wednesday, February 12, 2025 from 8:30 a.m. to 9:30 a.m. via web/teleconference.

3. How investors can participate

1. How to participate in the network:

The session will be live-streamed on https://edge.media-server.com/mmc/p/ibhnk4ps.

2. How to participate by phone:

Please register in advance for the conference call via the link below.

https://register.vevent.com/register/BIb8860a75a7634636b8d789d5bc063b86 3. Network playback:

Approximately 1 hour after the end of the meeting, you can listen to the recording again on the following page (valid for 12 months). https://www.smics.com/site/company_financialSummary

Fourth, contact departments and consultation methods

Contact Department: Investor Relations

Contact number: +86 21-20812800

Email: IR@smics.com

The announcement is hereby made.

Semiconductor Manufacturing International Corporation (SMIC).

board of directors

January 27, 2025