Notice on Convening the Second Extraordinary General Meeting of Shareholders in 2026

Securities Code: 301357 Securities Abbreviation: Northern Changlong Announcement No.: 2026-050

Northern Changlong New Materials Technology Co., Ltd.

Notice on Convening the Second Extraordinary General Meeting of Shareholders in 2026

The Company and all members of the Board of Directors guarantee that the information disclosed is true, accurate, and complete, and that there are no false records, misleading statements, or major omissions.

After deliberation and approval at the Second Meeting of the Third Board of Directors held on June 11, 2026, Northern Changlong New Materials Technology Co., Ltd. (hereinafter referred to as the "Company") has decided to convene the Second Extraordinary General Meeting of Shareholders in 2026. The relevant matters of this shareholder meeting are hereby notified as follows:

I. Basic Situation of the Meeting

1. Session of the Shareholder Meeting: The Second Extraordinary General Meeting of Shareholders in 2026.

2. Convener of the Shareholder Meeting: The Board of Directors of the Company.

3. Legality and Compliance of the Meeting: The convening and holding of this shareholder meeting comply with relevant laws, regulations, departmental rules, normative documents, and the "Articles of Association" after being deliberated and approved by the Seventeenth Meeting of the Second Board of Directors and the Second Meeting of the Third Board of Directors.

4. Date and Time of the Meeting:

(1) On-site meeting time: June 29, 2026 (Monday) at 15:00.

(2) Online voting time: June 29, 2026

The online voting time through the Shenzhen Stock Exchange trading system is: June 29, 2026, from 9:15-9:25, 9:30-11:30, and 13:00-15:00;

The voting time through the Shenzhen Stock Exchange internet voting system is: any time from 9:15 AM to 3:00 PM on June 29, 2026.

1. Meeting Method: This meeting will adopt a combination of on-site voting and online voting. The Company will provide an online voting platform for all shareholders through the Shenzhen Stock Exchange trading system and the internet voting system (http://wltp.cninfo.com.cn). Shareholders can exercise their voting rights through the above systems during the online voting period.

Shareholders can only choose one voting method, either on-site voting or online voting. If the same voting right is voted on repeatedly, the result of the first vote shall prevail.

1. Registration Date for Equity: June 24, 2026 (Wednesday)

2. Attendees:

(1) All shareholders of the Company registered with the Shenzhen Branch of China Securities Depository and Clearing Corporation Limited as of the closing of the market on June 24, 2026, are entitled to attend this shareholder meeting and may entrust an agent in writing to attend the meeting and vote. The shareholder's agent does not need to be a shareholder of the Company (see Attachment 2 for the format of the power of attorney);

(2) Directors and senior management of the Company;

(3) Lawyers engaged by the Company to witness the meeting;

(4) Other personnel who should attend the shareholder meeting in accordance with relevant regulations.

1. Meeting Location: Conference Room 2, Second Floor, Military-Civil Fusion Composite Materials Industrial Park, No. 589 Hangteng Road, National Civil Aerospace Industrial Base, Xi'an City, Shaanxi Province.

II. Matters to be Discussed at the Meeting

1. Table 1: Proposal Code Table for this Shareholder Meeting