Changchai Company Limited(000570) : Changchai Company Limited(000570) internal control audit report in 2021

Notary Tianye Certified Public Accountants (special general partnership)

Gongzheng Tianye Certified PublicAccountants, SGP

China. Jiangsu Wuxi Wuxi Jiangsu . China

Switchboard: 86 (510) 68798988 Tel: 86 (510) 68798988

Fax: 86 (510) 68567788 Fax: 86 (510) 68567788

Email: [email protected]. E-mail: [email protected].

Internal control audit report

Sugong w [2022] e1139 Changchai Company Limited(000570) all shareholders:

In accordance with the guidelines on audit of internal control of enterprises and the relevant requirements of the practice standards for Certified Public Accountants of China, we have audited the effectiveness of internal control over the financial statements of Changchai Company Limited(000570) (hereinafter referred to as Changchai shares) as of December 31, 2021.

1、 Responsibility of enterprises for internal control

It is the responsibility of the board of directors of Changchai Co., Ltd. to establish, improve and effectively implement internal control and evaluate its effectiveness in accordance with the basic norms of enterprise internal control, guidelines for the application of enterprise internal control and guidelines for the evaluation of enterprise internal control.

2、 Responsibilities of Certified Public Accountants

Our responsibility is to express audit opinions on the effectiveness of internal control over financial reporting based on the implementation of audit work, and disclose the significant defects of non-financial reporting internal control noted.

3、 Inherent limitations of internal control

Internal control has inherent limitations, and there is the possibility that misstatement can not be prevented and found. In addition, as changes in circumstances may lead to inappropriate internal control or reduced compliance with control policies and procedures, there is a certain risk to speculate the effectiveness of internal control in the future according to the internal control audit results.

4、 Audit opinion on internal control of financial report

We believe that Changchai has maintained effective internal control over financial reporting in all major aspects in accordance with the basic norms of enterprise internal control and relevant regulations on December 31, 2021.

Notarized Tianye certified public accountants, Chinese Certified Public Accountants:

(special general partnership) (project partner)

Wuxi, China Certified Public Accountant:

April 11, 2022

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