Eight o'clock at night. According to official website's inquiry, the Book Building in Hexi District, Tianjin, closed at 8 pm. 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.