U.S.-listed shares of China’s biggest online retailer, JD.com Inc., reached an all-time high Monday after it announced plans to develop drone aircraft capable of carrying a ton or more for long-distance deliveries.

The Beijing-based company said it will test the drones on a network it is developing to cover the northern Chinese province of Shaanxi. It said they will carry consumer goods to remote areas and farm produce to cities.

JD.com says it made its first deliveries to customers using smaller drones in November. Other e-commerce brands including Amazon.com Inc. also are experimenting with drones for delivery. A 1 ton payload is heavier than what most drones available now can carry, though some can carry hundreds of pounds and major drone makers are working on devices able to carry more.

China is home to the world’s biggest manufacturer of civilian drones, DJI, in the southern city of Shenzhen. JD.com’s U.S.-listed shares closed up 1.5 percent at $41.66.