CHYY Development Group Limited — Proxy Solicitation & Information Statement 2016

Aug 29, 2016

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(Incorporated in the Cayman Islands with limited liability)

(Stock Code: 8128)

EXTRAORDINARY GENERAL MEETING FORM OF PROXY

I/We (note 1)

of

being the holder(s) of (note 2)

shares of US$0.01 each

in the share capital of China Ground Source Energy Industry Group Limited (the “ Company ”), HEREBY APPOINT (note 3)

of

or (note 4) the Chairman of the Extraordinary General Meeting (the “ EGM ”) to act as my/our proxy/proxies at the EGM (and at any adjournment thereof) to be held at Regus Conference Centre, 35th Floor, Central Plaza, 18 Harbour Road, Wanchai, Hong Kong on Monday, 26 September 2016 at 11:00 a.m. for the purposes of considering and, if thought fit, passing the resolutions set out in the notice convening the EGM and at such EGM (and at any adjournment thereof) to vote for me/us and in my/our name(s) in respect of the resolutions as hereunder indicated.

ORDINARY RESOLUTION

FOR (note 5) AGAINST (note 5)

1. To pass the ordinary resolution no. 1 set out in the notice of the EGM in respect of the sale and purchase framework agreement entered into between the Company and China Energy Conservation and Environmental Protection Group Company* 中國節能環保集 團公司 and the proposed annual caps for the continuing connected transaction thereunder.

SPECIAL RESOLUTION

1. To pass the special resolution no. 2 set out in the notice of the EGM in respect of the amendments to the Articles of Association and adoption of amended and restated Articles of Association.

Signature (note 8)

Dated this day of 2016

Notes:

1. Full name(s) and address(es) are to be inserted in BLOCK CAPITALS . The names of all joint holders should be stated. Only one of the joint holders needs to sign (but see note 7 below).

2. Please insert the number of shares of the Company to which this form of proxy relates. If no number is inserted, this form of proxy will be deemed to relate to all the shares of the Company registered in your name(s).

3. A member entitled to attend and vote at the EGM is entitled to appoint more than one proxy to attend and, on poll, vote on his behalf. A proxy need not be a member of the Company.

4. If any proxy other than the Chairman of the EGM is preferred, strike out “or the Chairman of the Extraordinary General Meeting” and insert the name and address of the proxy desired in the space provided. If no name is inserted, the duly appointed Chairman of the EGM will act as your proxy. ANY ALTERATION MADE TO THIS FORM OF PROXY MUST BE INITIALLED BY THE PERSON WHO SIGNS IT.

5. IMPORTANT: IF YOU WISH TO VOTE FOR A RESOLUTION, PLEASE TICK (“ � ”) THE BOX MARKED “FOR”. IF YOU WISH TO VOTE AGAINST A RESOLUTION, PLEASE TICK (“ � ”) THE BOX MARKED “AGAINST”. Failure to complete the box will entitle your proxy to cast his votes at his discretion. A proxy will also be entitled to vote at his direction on any resolution properly put to the EGM other than those set out in the notice convening the EGM.

6. To be valid, this form of proxy, together with any power of attorney or other authority (if any) under which it is signed or a notarially certified copy of such power of attorney or authority, must be deposited at the Company’s branch share registrar in Hong Kong, Computershare Hong Kong Investor Services Limited at Shops 1712-1716, 17th Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai Hong Kong not less than 48 hours before the time fixed for the EGM or any adjournment thereof.

7. Where there are joint holders of any shares of the Company, any one of such persons may vote at the EGM either personally, or by proxy, in respect of such shares of the Company as if he were solely entitled thereto, and if more than one of such joint holders are present at the EGM personally or by proxy, the joint holder whose name stands first on the register of members of the Company in respect of the relevant joint holding shall alone be entitled to vote.

8. This form of proxy must be signed by you or your attorney duly authorised in writing or, if you are a corporation, must either be executed under seal or under the hand of an officer, attorney or other person duly authorised.

9. Completion and return of the form of proxy will not preclude you from attending and voting in person at the EGM and in such event, the form of proxy shall be deemed to be revoked.

* For identification purposes only