China BlueChemical : Reply Slip for Domestic Shareholders' Class Meeting

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

(Stock code: 3983)

Reply Slip for Domestic Shareholders' Class Meeting

I/(We) of (address) , telephone number: and fax number: ,

being the holder(s) of the domestic shares/ unlisted foreign shares* of China BlueChemical Ltd. (the ''Company'') hereby confirm that I (We) wish to attend or appoint a proxy to attend (on my/(our) behalf) the class meeting for the shareholders of the domestic shares and unlisted foreign shares of the Company (''Domestic Shareholders' Class Meeting'') to be held at the Meeting Room, 3rd Floor, Kaikang CNOOC Mansion, No. 15 Sanqu, Anzhenxili, Chaoyang District, Beijing, the PRC on Friday, 2 June 2017 at 11 : 15 a.m.

Signature(s):

Date: 2017

Note: Shareholders of domestic shares or unlisted foreign 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 the Company's Secretary Office of the Board of Directors in China on or before Friday, 12 May 2017. The Company's Secretary Office of the Board of Directors in China is Room 1707, Kaikang CNOOC Mansion, No.15, Sanqu, Anzhenxili, Chaoyang District, Beijing, the PRC (Tel: 0086-10- 84527250, Fax: 0086-10-84527254, Post code: 100029).

* For identification purpose only

* Please delete as appropriate. Domestic shares means unlisted shares issued by the Company to domestic investors for subscription in Renminbi; unlisted foreign shares means shares issued by the Company to foreign investors for subscription in foreign currency which are unlisted.