AGREEMENT OF JOINT FILING

Exhibit 99.1

Exhibit A

AGREEMENT OF JOINT FILING

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned hereby confirm the agreement by and between them to the joint filing on behalf of them of a Statement on Schedule 13D and any and all amendments thereto, with respect to the above referenced securities and that this agreement be included as an Exhibit to such filing. This agreement may be executed in any number of counterparts each of which shall be deemed to be an original and all of which together shall be deemed to constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned hereby execute this agreement as of this 29th day of May 2014.

	ALI YK INVESTMENT HOLDING LIMITED
	By:	/s/ Xxxxxxx X. Xxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxx
		Title: Director
	ALIBABA INVESTMENT LIMITED
	By:	/s/ Xxxxxxx X. Xxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxx
		Title: Director
	ALIBABA GROUP HOLDING LIMITED
	By:	/s/ Xxxxxxx X. Xxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxx
		Title: Authorized Signatory
	YF VENUS LTD
	By:	/s/ Xxxxx Xxx
		Name: Xxxxx Xxx
		Title: Director
	YUNFENG FUND II, L.P.
	By:	YUNFENG INVESTMENT II, L.P.,
		its general partner
	By:	YUNFENG INVESTMENT XX XX, LTD.,
		its general partner
	By:	/s/ Yu Feng
		Name: Yu Feng
		Title: Director
	YUNFENG INVESTMENT II, L.P.
	By:	YUNFENG INVESTMENT XX XX, LTD.,
		its general partner
	By:	/s/ Yu Feng
		Name: Yu Feng
		Title: Director
	YUNFENG INVESTMENT XX XX, LTD.
	By:	/s/ Yu Feng
		Name: Yu Feng
		Title: Director
	YU FENG
	/s/ Yu Feng