China Hydroelectric SC 13D/A China Hydroelectric / NewQuest Asia Fund I ownership change

EXHIBIT 99.1

JOINT FILING AGREEMENT

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules and regulations thereunder, each party hereto hereby agrees to the joint filing, on behalf of each of them, of any filing required by such party under Section 13 or Section 16 of the Exchange Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with the Securities and Exchange Commission (and, if such security is registered on a national securities exchange, also with the exchange), and further agrees to the filing, furnishing, and/or incorporation by reference of this agreement as an exhibit thereto. This agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party.

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	NEWQUEST CAPITAL MANAGEMENT (CAYMAN) LIMITED
	By:	/s/ Randhirsingh Juddoo
	Name:	Randhirsingh Juddoo
	Title:	Director

NEWQUEST ASIA FUND I (G.P.) LTD.
By:	/s/ Darren Massara
Name:	Darren Massara
Title:	Director

By:	/s/ Randhirsingh Juddoo
Name:	Randhirsingh Juddoo
Title:	Director

NEWQUEST ASIA FUND I, L.P. By: NewQuest Asia Fund I (G.P.) Ltd.
By:	/s/ Darren Massara
Name:	Darren Massara
Title:	Director

By:	/s/ Randhirsingh Juddoo
Name:	Randhirsingh Juddoo
Title:	Director

CPI BALLPARK INVESTMENTS LTD
By:	/s/ Georges A. Robert
Name:	Georges A. Robert
Title:	Director

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	SWISS RE FINANCIAL PRODUCTS CORPORATION
	By:	/s/ Hank Chance
		Name: Hank Chance
		Title: Authorized Signatory

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	CHINA ENVIRONMENT FUND III, L.P.
	By: China Environment Fund III Management,
	L.P., its general partner By: China Environment Fund III Holdings Ltd., its general partner
	By:	/s/ Yun Pun Wong
		Name: Yun Pun Wong Title:   Authorized signatory

Date: August 30, 2012	CHINA ENVIRONMENT FUND III MANAGEMENT, L.P.
	By: China Environment Fund III Holdings Ltd.,
	its general partner
	By:	/s/ Yun Pun Wong
		Name: Yun Pun Wong Title:   Authorized signatory

Date: August 30, 2012	CHINA ENVIRONMENT FUND III HOLDINGS LTD.
	By:	/s/ Yun Pun Wong
		Name: Yun Pun Wong Title:   Authorized signatory

Date: August 30, 2012	DONALD C. YE
	By:	/s/ Donald C. Ye

Date: August 30, 2012	SHELBY CHEN
	By:	/s/ Shelby Chen

Date: August 30, 2012	MICHAEL LI
	By:	/s/ Michael Li

Date: August 30, 2012	LARRY ZHANG
	By:	/s/ Larry Zhang

Date: August 30, 2012	IAN ZHU
	By:	/s/ Ian Zhu

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	AQUA RESOURCES ASIA HOLDINGS LIMITED
	By:	/s/ Kimberly Tara
		Name: Kimberly Tara
		Title: Director

Date: August 30, 2012	AQUA RESOURCES FUND LIMITED By: FourWinds Capital Management, its investment manager
	By:	/s/ Kimberly Tara
		Name: Kimberly Tara
		Title: CEO, FourWinds Capital Management

Date: August 30, 2012	FOURWINDS CAPITAL MANAGEMENT
	By:	/s/ Kimberly Tara
		Name: Kimberly Tara
		Title: CEO, FourWinds Capital Management

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	ABRAX
	By:	/s/ Manuel Salvisberg
		Name: Manuel Salvisberg
		Title:   Director

Date: August 30, 2012	ABRAX LIMITED
	By:	/s/ Manuel Salvisberg
		Name: Manuel Salvisberg
		Title:   Director

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this agreement to be executed and effective as of the date first written above.

Date: August 30, 2012	IWU INTERNATIONAL LTD.
	By:	/s/ Li Wu Fehlmann
		Name: Li Wu Fehlmann
		Title:   Director