Xinjin county is a county under the jurisdiction of Chengdu. Located in the west of Sichuan Basin and the south of Chengdu, it is connected to Shuangliu District in the east, Meishan City in the south, Qionglai City in the west and Dayi County and chongzhou city in the north. It is the south gate of Chengdu. Xinjin covers an area of 330 square kilometers, governs 6 streets, 5 towns and 1 township, with a total population of 309,600 (20 14), including urban residents120,000.
Pujiang County is a county under the jurisdiction of Chengdu, located at the intersection of Chengdu, Meishan and Ya 'an. The county borders Dongpo District and Pengshan District of Meishan City in the east, Mingshan District in the west, Dan Ling County in the south and Qionglai City in the north. The county covers an area of 583 square kilometers and governs 8 towns and 4 townships.
Dayi County belongs to Chengdu, Sichuan Province, located in the west of Chengdu Plain, bordering Qionglai Mountains. Chongzhou city in the east, Xinjin County in the southeast, Qionglai City in the southwest, Lushan County and Baoxing County in Ya 'an City in the west and Wenchuan County in Aba Prefecture in the north. The total area of the county 1327 square kilometers.
The total land area of the four counties and cities is 3624 square kilometers, and the land area of Chengdu is 14605 square kilometers. The land area of the four counties and cities accounts for about 25% of the total land area of Chengdu.