April 22nd and 23rd. According to the inquiry of China Education official website, the online entrance examination of subjects in 2023 will be held on April 22nd and 23rd. During the period, the examination time for Chinese subjects is 9: 00-1:30 am on the 22nd, the examination time for mathematics subjects is 22 pm 15- 17, the examination time for historical physics subjects is 8:30- 10, and the examination time for political chemistry subjects is 8: 30 am.