2. Ningbo Sam Supermarket is a member store of Sam (Ningbo North Store) and Sam (Ningbo Yinzhou Store). Sam Member Store is a high-end membership store owned by Wal-Mart, a Fortune 500 company. Its name is taken from Mr. sam walton, the legend of the retail industry and the founder of Wal-Mart. The first Sam member store in China was established in Shenzhen on August 1996.