Two hours. According to the inquiry rules of mathematics examination of Xiaoshengchu Examination in Hedong District, Tianjin, in 2023, the subjects of Xiaoshengchu Examination in Tianjin will be Chinese, mathematics and English, and the examination time will be 6.27 to 6.28, and the mathematics examination time will be two hours. 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.