SINA [SINA] 6-K: (Original Filing)
[SINA Forms Strategic Alliance with Alibaba to Enable Social Commerce SHANGHAI, ChinaApril 29, 2013 Weibo Alibaba SINA Corporation (NASDAQ GS: SINA) (SINA or the Company), a leading online media company serving China and the global Chinese communities, announced today that it has reached an agreement on a strategic alliance between several entities affiliated with SINA, including PRC subsidiaries of Weibo] [FORM 6-K May 2013 SINA Corporation 37F, Jin Mao Tower 88 C entury B oulevard, P udong Shanghai 200 121 , China Form 20-F x Form 40-F o o o TABLE OF CONTENTS]