Eighty minutes. According to official website of Yibin Education and Sports Bureau, the eighth grade in Yibin, Sichuan scored 840 points, Chinese 150 points, mathematics 150 points, English 150 points, physics 80 points, chemistry 70 points, humanities and society 140 points, and morality and rule of law 70 points. I got an excellent score of 90 points in every subject. 80 years old is normal.