Yunnan Aluminium Co.Ltd(000807) : China Securities Co.Ltd(601066) verification opinions on Yunnan Aluminium Co.Ltd(000807) annual securities investment in 2021

China Securities Co.Ltd(601066)

The verification opinions on the securities investment in Yunnan Aluminium Co.Ltd(000807) 2021 are in accordance with the requirements of relevant laws, regulations and normative documents, such as the stock listing rules of Shenzhen Stock Exchange, the guidelines for the business handling of listed companies No. 2 – matters related to the disclosure of periodic reports of Shenzhen Stock Exchange, China Securities Co.Ltd(601066) (hereinafter referred to as ” China Securities Co.Ltd(601066) securities” or “sponsor”) as the sponsor of Yunnan Aluminium Co.Ltd(000807) (hereinafter referred to as ” Yunnan Aluminium Co.Ltd(000807) ” or “company”) non-public offering of shares, carefully checked the securities investment in 2021, and now the verification is explained as follows: I. overview of the company’s securities investment

In July 2012, the company took Yunnan Aluminum International Co., Ltd. (hereinafter referred to as “Yunnan Aluminum international”), a wholly-owned subsidiary incorporated in Hong Kong, as the investment subject and as the cornerstone investor, and participated in the 2012 H-share issuance of China Aluminum International Engineering Corporation Limited(601068) (hereinafter referred to as ” China Aluminum International Engineering Corporation Limited(601068) “) with international engineering design, construction and general contracting capacity in the non-ferrous metal industry, 19495000 China Aluminum International Engineering Corporation Limited(601068) H shares were subscribed at the transaction price of HK $3.93 per share (excluding Commission, levy, etc.), with a total subscription price of HK $76615350 (excluding Commission, levy, etc. HK $77228273).

The matter was considered and adopted at the 15th meeting of the Fifth Board of directors held on June 19, 2012.

2、 Profit and loss of securities investment in 2021

By the end of the reporting period of 2021, Yunnan Aluminum international, a wholly-owned subsidiary of the company, holds 19495000 China Aluminum International Engineering Corporation Limited(601068) H shares. The company adopts fair value for subsequent measurement, and the gains or losses arising from changes in fair value are recognized as other comprehensive income. By the end of the reporting period in 2021, the specific details of the company’s securities investment are as follows:

Unit: RMB

Book value at the beginning of the initial investment meeting included in equity at the end of the reporting period

Cumulative fair value of bonds in the valuation period

Short term change in public offering period

Weighing allowable purchase and sale loss

Model price Jin Jinyi

Formula value

change

move

damage

benefit

Zhonggong

Aluminum tolerance 0

The national price of 627274441 is 226441604 – 252671626 0.0 0.0 0.0374602815, and the international value is 2300 1H

Stock quantity

627274441226441604 – 252671626 0.0 0 0.0374602815 — 0

Total 4 2 3 0 0 1

3、 Implementation of internal control system for securities investment during the reporting period

During the reporting period, the company strictly implemented the relevant securities investment regulations of China Securities Regulatory Commission and Shenzhen Stock Exchange, as well as the articles of association, Yunnan Aluminium Co.Ltd(000807) securities investment management measures and other relevant requirements. 4、 Impact of securities investment on the company

Yunnan Aluminum international, a wholly-owned subsidiary of the company, holds 19495000 China Aluminum International Engineering Corporation Limited(601068) H shares. The company adopts fair value for subsequent measurement, and the gains or losses arising from changes in fair value are recognized as other comprehensive income. 5、 Opinions of independent directors

After verification, the company’s funds for securities investment in 2012 came from the company’s own funds, which did not affect the development of the company’s main business. The company conducts securities investment in strict accordance with the requirements of relevant laws and regulations, the articles of association and Yunnan Aluminium Co.Ltd(000807) securities investment management measures and other relevant rules and regulations. The decision-making procedures are legal and compliant, the internal control system is strictly implemented, the safety of funds can be guaranteed, and there is no violation of relevant laws, regulations and rules.

6、 Verification opinions of the recommendation institution

In 2021, the sponsor checked the compliance and effectiveness of the securities investment and the internal control system of securities investment in Yunnan Aluminium Co.Ltd(000807) 2021 by means of data review, on-site inspection and communication with the management.

China Securities Co.Ltd(601066) Securities believes that: the securities investment of Yunnan Aluminium Co.Ltd(000807) 2021 does not violate the provisions of relevant laws, regulations and normative documents such as the stock listing rules of Shenzhen Stock Exchange and the guidelines for the standardized operation of listed companies of Shenzhen Stock Exchange, and complies with the provisions of the articles of Association and the measures for the administration of Yunnan Aluminium Co.Ltd(000807) securities investment. The decision-making procedures are legal and compliant, and the safety of funds can be guaranteed. (there is no text on this page, which is the signature page of China Securities Co.Ltd(601066) verification opinions on Yunnan Aluminium Co.Ltd(000807) 2021 annual securities investment)

Sponsor representative:

Li Yanzhi, Wang Zhuyuan

China Securities Co.Ltd(601066) March 21, 2022

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