Western Union sounds instantly fishy to me.
I googled the subject:
http://resources.alibaba.com/topic/593/Western_Union_Payments.htm
http://service.alibaba.com/buyer/faq_detail/13886869.htm
http://community.tradekey.com/forum/topic-1021/Be_Aware_of_Alibabacom_Scammers/20.html
I'm sorry I couldnt be of more help, maybe the more experienced Alibaba buyers can tell you more...
I googled the subject:
http://resources.alibaba.com/topic/593/Western_Union_Payments.htm
http://service.alibaba.com/buyer/faq_detail/13886869.htm
http://community.tradekey.com/forum/topic-1021/Be_Aware_of_Alibabacom_Scammers/20.html
I'm sorry I couldnt be of more help, maybe the more experienced Alibaba buyers can tell you more...