Guilin Town Office. Yongjia Berlin Mansion is a project located at the intersection of Bayu Avenue and Dongfeng Avenue in Jiangbei New Town, Tongnan County. It is adjacent to Bayu Avenue in the north, belonging to Guilin Town Office, and adjacent to Jinfo Bridge (Fujiang Second Bridge) in the west. The whole community covers an area of 16666 square meters. Tongnan generally refers to Tongnan District. Tongnan District, located in the northwest of Chongqing, is an emerging industrial base in Chengdu-Chongqing, an eco-cultural tourism destination in western Chongqing, a green vegetable capital in western China, and the core plate of the twin-city economic circle in Chengdu-Chongqing.