Luckin Coffee, mainland China’s largest coffee chain by store count, marked its milestone 30,000th outlet on Sunday in Shenzhen, with plans to boost global supply chain integration by sourcing premium beans from top producing regions worldwide. Headquartered in Xiamen, southeast China’s Fujian province, Luckin’s store network spans more than 300 cities nationwide, and its international footprint is expanding fast, with operations in overseas markets like Singapore, Malaysia and the US. It...