Alibaba is the world's largest online and mobile commerce company as measured by gross merchandise volume. It operates China's online marketplaces, including Taobao (consumer-to-consumer) and Tmall (business-to-consumer). The China retail e-commerce platform is the most valuable cash flow-generating business at Alibaba. Additional revenue sources include China wholesale e-commerce, international retail and wholesale e-commerce, local consumer services, travel services, cloud computing, digital media and entertainment, Cainiao logistics services, and other businesses.