Luxury Fashion Brands Start to Sell on China's WeChat Messaging App; Tencent highlights WeChat's vast user base and multimedia platform to court the likes of Burberry, Longchamp, Dior and Cartier

France's Longchamp and the U.K.'s Burberry Group PLC have begun selling handbags and clothes on WeChat, China's most popular messaging app. The move signals a challenge to Alibaba Group Holding Ltd., where online transactions are expected to reach $870 billion this year, according to Bain & Company.