A professor has suggested that boys should start school one or two years later than girls, which has heated up debate on tolerance and discrimination in the education system.

Wu Bihu, a professor from the College of Urban and Environmental Sciences of Peking University, suggested on his micro blog at the end of September that girls should start school at 6 to 7 years old, but boys could start at 7 to 8.

Wu believes boys and girls differ in their stages of mental development.