JD.com, Inc., also known as Jingdong, internationally known as Joybuy and formerly called 360buy, is a Chinese e-commerce company headquartered in Beijing. It is one of the two massive B2C online retailers in China by transaction volume and revenue, a member of the Fortune Global 500 and a major competitor to Alibaba-run Tmall. When classified as a tech company, it is the largest in China by revenue, and 7th in the world in 2021.