The merger between Meituan.Com and Dianping Holdings could be announced as early as Thursday, Bloomberg cited sources close to the deal as saying.
Meituan is partially-owned by e-commerce behemoth Alibaba Group Holding, while Dianping is backed by its Internet rival Tencent.
Meituan is the leading enterprise in China's "group buying" market with a near 52 percent share in the first six months of this year, the report said, while Dianping accounts for nearly 30 per cent.
