The present city wall was built by Zhu Yuanzhang on the basis of the imperial city of Tang Dynasty. The southwest corner is the site of the former Tang Dynasty imperial city. He used this corner to extend outward and built the city wall, so the other three corners are right angles, while the southwest corner is round.

Key investment projects in Sichuan Province, key investment projects in Guanghan City and key business projects in Sichuan Province were built by Southwest City Holding Co., Ltd. The projects are located in Guanghan Economic Development Zone, Sichuan Province, adjacent to qingbaijiang district, Chengdu.

The total planned land area of the project is 5,000 mu, with a total investment of more than 8 billion yuan. The first phase covers an area of 2,000 mu and consists of China wine market, international food trading center, southwest antique city and western cultural collection city. Integrating Expo, exhibition, commerce, tourism, food, culture, wedding and modern service industry, it is a super-large pan-Expo business cluster with industry as the foundation, Expo as the support, tourism as the carrier, transaction as the platform and market as the orientation.