SF Express is not owned by Jack Ma, but it has a partnership with Jack Ma's Cainiao Network.

SF Express refers to four well-known express delivery companies in China, namely ZTO Express, YTO Express, STO Express and Yunda Express. They are independently operated and have their own business systems and market positioning. Although these companies occupy an important position in the express delivery industry, they are not directly owned by Jack Ma personally or Alibaba Group.

Cainiao Network, created by Jack Ma, is a logistics platform that aims to improve the efficiency of the entire logistics industry through technology and data-driven. Cainiao Network has established partnerships with many express delivery companies, including SF Express, to jointly build a logistics network and improve service quality. For example, Cainiao Network will use big data and technology to help cooperative express delivery companies optimize delivery routes and improve efficiency.

In addition, as Cainiao Network develops, it is also trying to provide certain logistics services on its own, such as "Cainiao Express", which may be to directly compete and improve its own capabilities in the logistics field. Although Cainiao Network competes with 3T Express and YTO Express in some aspects, the cooperation between them is still close, and they jointly serve a wide range of e-commerce logistics needs.