BEIJING (AP) — China’s biggest property developer, Wanda Group, and Internet giants Baidu and Tencent unveiled a new e-commerce venture Friday in a challenge to industry leader Alibaba Group ahead of its U.S. stock offering.

The three companies said they will integrate online and offline selling, with e-commerce services in Wanda’s 107 shopping malls, as well as its hotels and resorts. They said they would invest 5 billion yuan ($814 million) to start.