China BlueChemical Ltd. — Proxy Solicitation & Information Statement 2022

Apr 12, 2022

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

(Stock Code: 3983)

Reply Slip for H Shareholders’ Class Meeting

I/(We)of (address),telephone number:and fax number:,being the holder(s) ofoverseas-listed foreign share(s) (‘‘H Shares’’)of China BlueChemical Ltd. (the ‘‘Company’’) hereby confirm that I (We) wish to attend or appoint aproxy to attend (on my/(our) behalf) the class meeting for the shareholders of H Shares (‘‘HShareholders’ Class Meeting’’) to be held at the Meeting, 3rd floor, Kaikang CNOOC Mansion, No. 15Sanqu, Anzhenxili, Chaoyang District, Beijing, the PRC on Friday, 27 May 2022 at 9:40 a.m.

Signature(s):

Date: 2022

Note: Shareholders of H Shares who intend to attend the meeting in person or by proxy should return the reply slip in person, by post or by fax to Computershare Hong Kong Investor Services Limited on or before Saturday, 7 May 2022. The address of Computershare Hong Kong Investor Services Limited is 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong.

• For identification purpose only