Datang Environment Industry Group Co., Ltd. — Proxy Solicitation & Information Statement 2023

May 31, 2023

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Datang Environment Industry Group Co., Ltd.*

(A joint stock company incorporated in the People’s Republic of China with limited liability)

(Stock Code: 1272)

PROXY FORM FOR THE ANNUAL GENERAL MEETING FOR THE YEAR 2022 TO BE HELD ON 29 JUNE 2023

I/We [(Note][1)]

of (address)

domestic share(s)/H share(s) [(Note][2)]

being the registered holder(s) of domestic share(s)/H share(s) of RMB1.00 each in the share capital of Datang Environment Industry Group Co., Ltd. (the “ Company ”), hereby appoint THE CHAIRMAN OF THE MEETING* or [(Note][3)] of (address)

as my/our proxy(ies) to attend and act for me/us at the annual general meeting for the year 2022 (the “ 2022 AGM ”) to be held at 3:30 p.m. on Thursday, 29 June 2023 at No. 120 Zizhuyuan Road, Haidian District, Beijing, the PRC, to vote in respect of the resolutions set out in the notice of the 2022 AGM as hereunder indicated on behalf of me/us, or if no such indication is given, as my/our proxy(ies) thinks fit. Terms used in this proxy form shall have the same meanings as defined in the circular of the Company dated 31 May 2023.

ORDINARY RESOLUTIONS FOR [(Note][4)] AGAINST [(Note][4)] ABSTAIN [(Note][4)] 1. To consider and approve the Report of the Board for 2022; 2. To consider and approve the Report of the Supervisory Committee for 2022; 3. To consider and approve the Independent Auditor’s Report and the Audited Financial Statements for 2022; 4. To consider and approve the Final Financial Accounts for 2022; 5. To consider and approve the Financial Budget Report for 2023; 6. To consider and approve the Profit Distribution Plan for 2022 and the Proposed 2022 Final Dividend; 7. To consider and approve the re-appointment of Moore Stephens CPA Limited and Da Hua CPAs (Special General Partnership) as international and domestic auditors of the Company for 2023, respectively, with terms of engagement ended upon the conclusion of the 2023 annual general meeting of the Company, and the grant of authority to the Board, which further grants such authority to the senior management of the Company to determine remunerations of the auditors; 8. To consider and approve the Remuneration Reports for Directors and Supervisors for 2022; and 9. To consider and approve the Investment Plan for 2023. SPECIAL RESOLUTION FOR [(Note][4)] AGAINST [(Note][4)] ABSTAIN [(Note][4)]

1. To consider and approve the Remuneration Reports for Directors and Supervisors for 2022; and

2. To consider and approve the Proposed Amendments to the Articles of Association.

Date: 2023 Signature(s) [(Note][5)] :

Notes:

1. Please insert full name(s) (in Chinese or English) and address(es) as shown on the register of members of the Company in BLOCK CAPITALS .

2. Please insert the number of shares of the Company registered in your name(s) relating to this proxy form and delete as appropriate. If a number is inserted, this proxy form will be deemed to relate only to those shares. If no number is inserted, the proxy form will be deemed to relate to all shares of the Company registered in your name(s) (whether alone or jointly with others).

3. If any proxy other than the chairman of the meeting is preferred, please strike out “ THE CHAIRMAN OF THE MEETING or” and insert the name(s) and address(es) of the proxy(ies) desired in the space provided. A member may appoint one or more proxies to attend and vote at the meeting in his stead. A proxy need not be a shareholder of the Company but shall attend the meeting on your behalf in person. Such proxies may only exercise their voting rights in a poll. Any alteration made to this proxy form must be signed by the person who signs it.

4. Important:“ AGAINST If”.youIf youwishwishto voteto abstainfor anyfromresolutions,voting inpleaserespect tick of theanyboxresolution,marked please“ FOR ”. tick If theyouboxwishmarkedto vote“ ABSTAIN against any”.resolution,In the absencepleaseof tick suchtheindication,box markedthe properlyproxy willputbetoentitledthe meetingto castotherhis thanvotesthoseat his/herreferreddiscretion.to in theYournoticeproxyof thewillmeeting.also beTheentitled“ ABSTAIN to vote” orvotesabstainwill atbehiscounteddiscretionin theincalculationrespect of ofanytheresolutionrequired majority.

5. This proxy form shall be signed by you or your attorney duly authorised in writing or, in the case of a legal person, must be either executed under its common seal or under the hand of its legal representative(s), director(s) or duly authorised attorney(s). If that instrument is signed by an attorney of the shareholder, the power of attorney authorising that attorney to sign or other authorisation documents shall be notarised.

6. In the case of joint shareholders, any of such joint shareholders may vote at the meeting, either in person or by proxy, in respect of such shares as if he/she is solely entitled thereto. However, if more than one of such joint shareholders are present at the meeting, in person or by proxy, the vote of the joint shareholder whose name stands first in the register of members of the Company, whether in person or by proxy, will be accepted to the exclusion of the votes of the other joint shareholder(s).

7. To be valid, this proxy form together with the notarised power of attorney (if any) or other authorisation document (if any) under which it is signed or a notarially certified copy thereof, must be deposited at the Company’s H Share Registrar, Computershare Hong Kong Investor Services Limited, at 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong for holders of H shares not less than 24 hours before the time fixed for the meeting or any adjournment thereof.

8. To be valid, this proxy form together with the notarised power of attorney (if any) or other authorisation document (if any) under which it is signed or a notarially certified copy thereof, must be delivered to the Company’s board office in the PRC for holders of domestic shares, at No. 120 Zizhuyuan Road, Haidian District, Beijing, the PRC, 100097 not less than 24 hours before the time fixed for holding the meeting or any adjournment thereof.

9. Completion and return of a proxy form will not preclude a shareholder from attending and voting in person at the meeting or any adjournment thereof if he/she so wishes. In such event, the instrument appointing a proxy shall be deemed to be revoked. Shareholders or their proxies attending the meeting (and any adjournment thereof) shall produce their identity documents.

* For identification purpose only