Sanxia District is a district in the southwestern part of New Taipei, Taiwan. It is the second largest district in New Taipei City by area after Wulai District. The old name of Sanxia, Sa-kak-eng refers to the meeting of the Dahan River, Sanxia River, and Horizontal River. In 1920, Taiwan's Japanese government administratively designated the town as Sanky…Sanxia District is a district in the southwestern part of New Taipei, Taiwan. It is the second largest district in New Taipei City by area after Wulai District. The old name of Sanxia, Sa-kak-eng refers to the meeting of the Dahan River, Sanxia River, and Horizontal River. In 1920, Taiwan's Japanese government administratively designated the town as Sankyō, Kaizan District, Taihoku Prefecture.