Tianjin may day is not limited. In Tianjin, April 29th to May 3rd is a legal holiday (Labor Day), and motor vehicles with local and foreign license plates and registered with the regional indicators of passenger cars in this city are not restricted. On May 4th (Thursday), the vehicle tail numbers are 2 and 7. Therefore, Tianjin may day is not limited. Tianjin generally refers to Tianjin. Tianjin, referred to as Jingu and Jinmen for short, is a provincial administrative region, municipality directly under the Central Government, national central city and megacity in People's Republic of China (PRC), a national advanced manufacturing R&D base, a core area of northern international shipping, a demonstration area of financial innovation and operation, and a pioneer area of reform and opening up.