Tianjin (天津市) is a provincial-level administrative region under the direct administration of central government, one of the nine National Central Cities, and one of China’s mega-cities. The city has 16 districts under its jurisdiction, with a total area of 11916.85 square kilometers, a built-up area of 1007.91 square kilometers, a resident population of 15.5 million with an urban population of 12.9 million.
Chongqing (重庆市) is located in the southwestern part of China’s inland, bordering Hubei and Hunan in the east, Guizhou in the south, Sichuan in the west, and Shaanxi in the north. The total area of 82,400 square kilometers, jurisdiction over 38 districts (counties) with a resident population of 31,017,900 and a GDP 2.036319 trillion yuan.
Yunnan Province is located in China’s southwest with Kunming serving as the capital of the province. It is adjacent to Guizhou and Guangxi in the east, Sichuan in the north, Tibet in the northwest. It has an international border with Myanmar in the west and Laos and Vietnam in the south.
Zhejiang province (浙江 zhè jiāng) is located on the southeast coast of China with Hangzhou as its capital. It borders the East China Sea to the east, Fujian to the south, Anhui and Jiangxi to the west, and Shanghai and Jiangsu in the north. The total area of Zhejiang Province is 105,500 square kilometers.
Zhangjiajie (张家界市), a city located in Hunan Province, is famed for its mountainous regions featuring karst rock formations that were the inspiration for the scenes in the movie Avatar. Near to the city is the Wulingyuan Scenic Area featuring large-scale limestone karst landforms in the northern part of the scenic spot have been eroded and dissolved by the transition of hundreds of millions of years of rivers, forming spectacular landscapes and native wonders.