The area code of Tianjin mobile phone is 022.
1. Tianjin is called Tianjin for short. Tianjin is a municipality directly under the Central Government of the People's Republic of China, a national central city, a megacity, an economic center in the Bohai Rim region, one of the first coastal open cities, a national advanced manufacturing R&D base, a core area of northern international shipping, a demonstration area for financial innovation and operation, and a pilot area for reform and opening-up;
2. Tianjin has been rising since ancient times due to water transport. It was officially built on November 21, the second year of Yongle in the Ming Dynasty. It is the only city in ancient China that has an exact record of the time of building a city. After more than 600 years, it has created a unique urban style that combines Chinese and Western styles and is compatible with ancient and modern times;
3. Tianjin is located at the confluence of the five tributaries of Haihe River in the North China Plain, bordering the Bohai Sea in the east and Yanshan Mountain in the north. Haihe River winds through the city. Haihe River is Tianjin's mother river. Tianjin Binhai New Area is known as the third growth pole of China's economy, and Tianjin is the permanent host city of the Summer Davos Forum;
4. On December 12, 2014, the China Pilot Free Trade Zone, located in Binhai New Area, Tianjin, was officially approved by the state to be established. On April 21, 2015, the China Pilot Free Trade Zone was officially listed, and the China Pilot Free Trade Zone was the first free trade zone in northern China.