JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 99.1

JOINT FILING AGREEMENT

PURSUANT TO RULE 13d-1(k)

This joint filing agreement is made pursuant to Rule 13d-l(k)(1) under the Securities Exchange Act of 1934, as amended (the “Act”), by and among the parties listed below, each referenced to herein as a “Joint Filer”. The Joint Filers agree that a statement of beneficial ownership as required by Sections 13(g) or 13(d) of the Act and the Rules thereunder may be filed on each of their behalf on Schedule 13G or Schedule 13D, as appropriate, and that said joint filing may thereafter be amended by further joint filings. The Joint Filers state that they each satisfy the requirements for making a joint filing under Rule 13d-1.

DATE: November 30, 2018

	XXXX XXXXX
	/s/ Xxxx Xxxxx (Xxx-Xxx Xxxxx)
	Xxxx Xxxxx
	JAG INTERNATIONAL, LTD.
	By:	/s/ Xxxx Xxxxx (Xxx-Xxx Xxxxx)
	Name:	Xxxx Xxxxx
	Title:	General Partner
	BRILLIANT START ENTERPRISE, INC.
	By:	/s/ Xxxx Xxxxx (Xxx-Xxx Xxxxx)
	Name:	Xxxx Xxxxx
	Title:	General Partner
	XXXXXXXX XXX
	/s/ Xxxxxxxx Xxx
	Xxxxxxxx Xxx

	CLEANTECH GLOBAL LTD.
	By:	/s/ Xxxxxxxx Xxx
	Name:	Xxxxxxxx Xxx
	Title:	Managing Partner
	XXXXX TU
	/s/ Xxxxx Tu
	Xxxxx Tu
	5 ELEMENTS GLOBAL FUND L.P.
	By:	/s/ Xxxxx Tu
	Name:	Xxxxx Tu
	Title:	Managing Partner
	YEH-MEI XXX XXXXX
	/s/ Yeh-Xxx Xxx Xxxxx
	Xxx-Xxx Xxx Xxxxx
	COMMUNAL INTERNATIONAL, LTD.
	By:	/s/ Yeh-Mei Xxx Xxxxx
	Name:	Yeh-Mei Xxx Xxxxx
	Title:	Authorized Representative
	5 ELEMENTS ENERGY EFFICIENCY LIMITED
	By:	/s/ Yeh-Mei Xxx Xxxxx
	Name:	Yeh-Mei Xxx Xxxxx
	Title:	Authorized Representative