Alibaba Group Holding is seeing a rapid acceleration in the volume of on-demand delivery transactions, the latest sign of growing rivalry with Meituan and JD.com in China’s instant e-commerce market. Combined daily orders on Taobao Instant Commerce – the company’s latest push into on-demand delivery – and food delivery app Ele.me, reached 80 million, Taobao said on its official WeChat account on Monday. Daily active users on Taobao Instant Commerce surpassed 200 million. Alibaba owns the South...