Yum China Holdings is in talks to buy food delivery services firm Daojia for up to $200 million, two people familiar with the matter told Reuters, as the biggest operator of fast food on the mainland seeks to boost sales from customers dining at home. Yum China has long-term ambitions to triple its outlets in China to more than 20,000, but food delivery is also becoming a crucial area for restaurant operators to improve sales. The sources warned that discussions are at an early stage and a deal isn’t imminent. Established in 2010, Daojia focuses on online food orders and delivery services targeting China’s middle-class urbanites in 10 cities. It has a 3,000-strong logistics team, and works with more than 6,000 restaurants.