Baishamen is located on the east side of Haidian Island. The island is naturally alluvial from the Nandu River. It is named after a white sand beach on the beach, which was anciently called "Baishajin". Now due to a large amount of sand mining and real estate development, the white sand beach is gradually disappearing. Baishamen now refers to Baishamen Park, located in the north of Haidian Island. It covers an area of 60 hectares and is a large park integrating leisure and entertainment.