ByteDance’s Douyin, the Chinese counterpart of TikTok, is set to heat up competition in China’s instant commerce sector against Alibaba Group Holding, JD.com and Meituan with the merger of its online shopping platform and instant delivery service, according to a report by Chinese tech news website 36Kr on Wednesday. Douyin Supermarket, akin to TikTok Shop, is integrating with Douyin Hourly Delivery, which leverages precise mapping and location services to ensure rapid deliveries to consumers,...