Stock code: 688065 Stock abbreviation: Kaiser Bio Announcement No.: 2024-030.

Shanghai Kaisai Biotechnology Co., Ltd.

Announcement of Renewal of Appointment of Accounting Firm

the company's board of directors and all directors to ensure that the contents of this announcement does not exist any false records, misleading statements or major omissions, and the authenticity, accuracy and completeness of the contents of the legal responsibility.

Important Content Tips:

Name of the accounting firm to be appointed: Tianjian Certified Public Accountants (Special General Partnership)

Shanghai Kaiser Biotechnology Co., Ltd. (hereinafter referred to as the "Company") on June 4, 2024

The 20th meeting of the second board of directors was held, and the "Proposal on the Renewal of the 2024 Audit Institution" was reviewed and approved. The company intends to continue to appoint Tianjian Certified Public Accountants (Special General Partnership) (hereinafter referred to as "Tianjian") as the company's 2024 Annual financial and internal control audit agency, the proposal still needs to be submitted to the company's 2023 annual general meeting of shareholders for deliberation. The relevant matters are hereby announced as follows:

The basic situation of the 1.'s proposed appointment of accounting firms.

(I) Institution Information

1. Basic information

Name of firm Tianjian Certified Public Accountants (Special General Partnership)

Date of Establishment July 18, 2011 Form of Organization Special General Partnership

Registered Address: 6th Floor, 128 Xixi Road, Xihu District, Hangzhou City, Zhejiang Province

The number of partners at the end of the year is 238.

At the end of last year, the number of certified public accountants was 2,272.

836 certified public accountants who have signed the audit report of securities service business.

Total business income in 2023 (audited) is 3.483 billion yuan.

Revenue Audit Business Revenue 3.099 billion Yuan

Securities business income 1.84 billion yuan

In 2023, the number of customers of listed companies was 675.

(including shares a and B) the total audit fee is 0.663 billion yuan

The situation involves the manufacturing industry in major industries, information transmission, software and information technology services,

Wholesale and Retail, Real Estate, Construction, Electricity, Heat

Power, gas and water production and supply, finance, transportation

Transportation, storage and postal services, culture, sports and entertainment, rental

Leasing and business services, water, environment and public facilities management

Industry, scientific research and technical services, agriculture, forestry, animal husbandry and fishing

Industry, mining industry, accommodation and catering industry, education, comprehensive, etc.

The number of audit clients of listed companies in the same industry is 513.

2. Investor protection capacity

At the end of 2023, Tianjian Certified Public Accountants (Special General Partnership) has accrued more than 0.1 billion yuan of occupational risk fund, and the accumulated compensation limit of occupational insurance purchased exceeds 0.1 billion yuan. The accrual of occupational risk fund and the purchase of occupational insurance comply with the relevant provisions of the Ministry of Finance on the Measures for the Administration of Occupational Risk Fund of Accounting Firms and other documents. Tianjian Certified Public Accountants (Special General Partnership) has not been judged to bear civil liability in relevant civil litigation for its practice in the past three years.

3. Integrity Records

Tianjian Certified Public Accountants (Special General Partnership) for the past three years (January 1, 2021 to December 2023

On January 31) 1 administrative penalty, 14 supervision and management measures, and 6 self-discipline measures for practicing.

No criminal punishment or disciplinary action was taken. Practitioners have been subject to administrative penalties for their practice in the past three years.

35 times, supervision and management measures, 13 times of self-discipline and supervision measures, 3 times of disciplinary action, without punishment

The punishment involved a total of 50 people.

(II) Project Information

1. Basic information

When to become when to open when to start when to start nearly three years to sign or

Name Project Team Member Registered Accountant began to engage in the review of listed companies in Tianjian for the Company.

The audit report provided by the listed public sector.

Division Audit Services

Signed/resumed in recent three years

Nuclear Tianqi shares,

Medium and micro semi-conductor, liter

Hui Technology, Kaisai

Project partnership biology, double light.

Deng Huaming, Signature Note 2012 2008 2008 2023 Pine, A.D. Shares

Book accountant, Hesheng silicon.

Industry, Zhejiang Yong

Strong, Dongmu Xincai

Year of listed companies

Degree Audit Report

Signed in the past three years

Zeng Xiang Signed and Registered Hui Technology, Kaisai

Winning Accountant 2021 2016 2021 2022 Biology, Medium and Micro Half

Annual Audit Report

Report

Signed/resumed in recent three years

Nuclear Wufangzhai, Wei

Koryo Quality Control Recovery 2010 2008 2010 2022 Star Chemistry, Kaiser

Nuclear human biology and other listed public.

Annual Audit Report

Report

2. Integrity Records

Project partners, signed certified public accountants, and project quality control reviewers have not been subject to criminal penalties for their practice in the past three years, and have been subject to administrative penalties, supervision and management measures by the China Securities Regulatory Commission and its dispatched agencies, industry authorities, etc., and have been subject to stock exchanges, Self-regulatory measures and disciplinary actions by self-regulatory organizations such as industry associations.

3. Independence

There are no circumstances that may affect the independence of Tianjian Certified Public Accountants (Special General Partnership) and project partners, signed certified public accountants and project quality control reviewers.

4. Audit fees

The pricing of audit fees is based on various factors such as the size of the company's business, the industry in which it operates and the complexity of the accounting process, as well as the number of auditors required for the audit of the company's annual report and the amount of work invested, as well as the firm's fees.

The company's 2023 financial report audit fee is 1.05 million yuan and the internal control audit fee is 150000 yuan.

yuan, the 2024 audit fee will be drawn up for reference.

The Board of Directors of the Company requested the General Meeting of Shareholders to authorize the management of the Company to decide on the 2024 annual audit fees of Tianjian Certified Public Accountants (Special General Partnership) and sign relevant service agreements.

Procedures to be performed by the 2. of the proposed renewal of the accounting firm

Performance of the (I) Audit Committee

The 11th Audit Committee of the Second Board of Directors of the CompanyThe second meeting considered and passed the "Proposal on the Renewal of the 2024 Audit Institution".

To understand and review the professional competence, investor protection ability, independence and integrity, etc., and believe that it can meet the qualification requirements for providing audit services to the company during the practice process, and agree to renew the appointment of Tianjian Certified Public Accountants (special general partnership) As the company's 2024 financial and internal control audit agency, the employment period is one year, and agreed to submit the proposal to the company's board of directors for deliberation.

Deliberations and voting of the Board of Directors of the (II)

The company held the 20th meeting of the second board of directors on June 4, 2024, and reviewed and approved

motion to renew the auditor for the year 2024.

(III) Effective Date

The appointment of an accounting firm still needs to be submitted to the company's general meeting of shareholders for deliberation, and shall take effect from the date of deliberation and approval by the company's general meeting of shareholders.

It is hereby announced.

Shanghai Kaisai Biotechnology Co., Ltd.

Board of Directors

5 June 2024