China BlueChemical Ltd. — Proxy Solicitation & Information Statement 2018

Apr 16, 2018

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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 orappoint a proxy to attend (on my/(our) behalf) the class meeting for the shareholders of HShares (‘‘H Shareholders’ Class Meeting’’) to be held at the Meeting Room, 3rd Floor,Kaikang CNOOC Mansion, No. 15 Sanqu, Anzhenxili, Chaoyang District, Beijing, thePRC on Thursday, 31 May 2018 at 9: 50 a.m.

Signature(s):

Date: 2018

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 Friday, 11 May 2018. 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