China National Building Material : ANNOUNCEMENT - PRINCIPAL ACCOUNTING DATA AND FINANCIAL INDICATORS OF SINOMA INTERNATIONAL FOR THE YEAR ENDED 31 DECEMBER 2020

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(a joint stock limited company incorporated in the People's Republic of China with limited liability of its members)

ANNOUNCEMENT

PRINCIPAL ACCOUNTING DATA AND FINANCIAL INDICATORS

OF SINOMA INTERNATIONAL

FOR THE YEAR ENDED 31 DECEMBER 2020

The board of directors of China National Building Material Company Limited* (the "Company") would like to draw the attention of its shareholders and the public investors to the following principal accounting data and financial indicators of Sinoma International Engineering Co., Ltd.* ("Sinoma International") for the year ended 31 December 2020.

Sinoma International is a subsidiary of the Company and its A shares are listed and traded on the Shanghai Stock Exchange (stock code: 600970).

PRINCIPAL ACCOUNTING DATA AND FINANCIAL INDICATORS OF SINOMA INTERNATIONAL

(I)Principal Accounting Data

Unit: YuanCurrency: RMB

This reporting period (Year ended 31 December 2020)

Same period of the year of 2019

Increase/ decrease of this reporting period as compared with the same period of the year of 2019

Operating revenue

Net profit attributable to shareholders of

Sinoma International

Net profit attributable to shareholders of

Sinoma International after deducting extraordinary gains or losses

Net cash flow from operating activities

22,491,954,185.13 24,374,389,855.13 -7.72%

1,133,348,721.60 1,591,960,214.11 -28.81%

856,619,069.50 1,748,635,757.66

1,486,756,471.34 -42.38%

250,831,333.09

597.14%

At the end of this reporting period (31 December 2020)

At the end of the year of 2019 (31 December 2019)

Increase/ decrease at the end of this reporting period as compared with the end of of the year of 2019

Net assets attributable to shareholders of

Sinoma International

Total assets

10,780,105,028.02 10,184,507,253.43 5.85%

34,212,176,941.01 32,906,984,549.82 3.97%

(II) Principal Financial Indicators

Unit: Yuan Currency: RMB

This reporting period (Year ended 31 December 2020)

Increase/ decrease of this reporting period as compared withSame period of the year of 2019

the same period of the year of 2019

Basic earnings per share

(RMB/Share)

0.65

0.92 -29.35%

Diluted earnings per share

(RMB/Share)

0.65

0.92 -29.35%

Basic earnings per share after deducting extraordinary gains or losses (RMB/Share)

Weighted average return on net assets (%)

0.49 10.90

0.85 -42.35%

16.82 Decreased by

5.92 percentage points

Weighted average return on net assets after deducting extraordinary gains or losses (%)

8.24

15.71 Decreased by

7.47 percentage

points

Note: The full text of the annual report for the year ended 31 December 2020 of Sinoma

International will also be published on the website of the Shanghai Stock Exchange (http://www.sse.com.cn).

This announcement is made on a voluntary basis and not required specifically under the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited.

By order of the Board

China National Building Material Company Limited*

Yu Kaijun

Secretary of the Board

Beijing, the PRC

19 March 2021

As at the date of this announcement, the board of directors of the Company comprises Mr. Cao Jianglin, Mr. Peng Shou, Mr. Cui Xingtai and Mr. Fu Jinguang as executive directors, Ms. Zhan Yanjing, Mr. Chang Zhangli, Mr. Tao Zheng, Mr. Chen Yongxin, Mr. Shen Yungang and Ms. Fan Xiaoyan as non-executive directors and Mr. Sun Yanjun, Mr. Liu Jianwen, Mr. Zhou Fangsheng, Mr. Li Jun and Ms. Xia Xue as independent non-executive directors.

* For identification purposes only - 3 -