How many times did Tianjin go to Tibet for a physical examination as a soldier?

Three times. The national standard for serving as a soldier is that conscripts join the army and have three medical examinations, which belongs to the initial examination in the armed forces department where the household registration is located. The second time is a comprehensive physical examination, also called on-site physical examination. Organized by the armed forces departments of counties and cities, the third time is conducted in the army within one month after enlistment, which is called re-examination. Tianjin, also known as Jingu and Jinmen, is a provincial-level administrative region, municipality directly under the Central Government, national central city and megacity of People's Republic of China (PRC), and is the economic center of the Bohai Rim region determined by the State Council.