China BlueChemical : Reply Slip for Annual General Meeting

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

(Stock code: 3983)

Reply Slip for Annual General Meeting

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

being the holder(s) of H share(s)/ domestic share(s)/unlisted foreign share(s)* 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 2016 Annual General Meeting (''AGM'') 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 10 : 00 a.m.

Signature(s):

Date: 2017

Note: Shareholders who intend to attend the AGM 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 (for holders of domestic shares or unlisted foreign shares) or Computershare Hong Kong Investor Services Limited (for holders of H shares) 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). 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

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