Simplify the following text for a Grade 7 native English-speaking person.
Original: The Mayor of Tianjin is the highest ranking official in the People 's Government of Tianjin . Since Tianjin is a municipality , the Communist Party of China Municipal Committee Secretary is colloquially termed the `` Tianjin CPC Party chief '' .
Simplified: Tianjin is the birthplace of the first university in China .