Shearman & Sterling, Skadden, Arps, Slate, Meagher & Flom, Ropes & Gray and Simpson Thacher & Bartlett are advising on Chinese dating app Momo’s go-private transaction, which values the app at more than $3 billion.

Founded in 2011 and dubbed “China’s Tinder,” Momo went public in the U.S. in December 2014. A buyout group including Yan Tang, chairman and chief executive officer of Momo, Matrix Partners China II Hong Kong Limited, Sequoia Capital China Investment Management and Huatai Ruilian Fund Management announced the buyout plan last June

A recent regulatory filing showed that Alibaba had joined the buyout group, causing the shares of Momo to rise on the New York Stock Exchange. 

Simpson Thacher’s Hong Kong partner Kathryn Sudol is advising Alibaba. A Skadden team, led by Hong Kong partners Julie Gao and Haiping Li, and Beijing partners Peter Huang and Daniel Dusek, are acting for Momo’s chairman and other shareholders including Matrix Partners and Yunfeng Capital, a private equity firm partly owned by Alibaba chairman Jack Ma.

Meanwhile, Ropes & Gray Boston partner Craig Marcus is representing ‎Sequoia Capital, and Shearman & Sterling’s Hong Kong partner Stephanie Tang is advising a special committee of independent directors at Momo.

The deadline to complete the buyout has been extended to April 5, 2017.