CUSIP No. 98952K107 | Page 11 of 11 |
Exhibit 1
JOINT FILING UNDERTAKING
The undersigned, being authorized thereunto, hereby execute this agreement as an exhibit to this Schedule 13D to evidence the agreement of the below-named parties, in accordance with rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule, as it may be amended, jointly on behalf of each of such parties.
Dated: April 2, 2012 | PRESTIGE TRADE INVESTMENTS LIMITED | |||
By: | /s/ Michael Wu | |||
Michael Wu Attorney-In-Fact | ||||
SIMING YANG | ||||
By: | /s/ Michael Wu | |||
Michael Wu Attorney-In-Fact | ||||
CHIDONG WANG | ||||
By: | /s/ Michael Wu | |||
Michael Wu Attorney-In-Fact | ||||
FEI XIAO | ||||
By: | /s/ Michael Wu | |||
Michael Wu Attorney-In-Fact |