What did imperial academy interrogate and punish students who made mistakes in the Ming Dynasty?

There was a "rope hall" in imperial academy in the Ming Dynasty, which was like a court and prison in a school to judge and punish students.

In the Ming Dynasty, the rulers set up imperial academy to teach Confucianism, but in the Yuan Dynasty, the Mongolian sub-school and the sub-school to teach minority cultures were abolished. Ming Taizu's period was the founding stage of imperial academy, who transformed imperial academy from the former educational administrative institution into the national educational administrative institution and the highest institution of learning. In the Ming Dynasty, there were two prisons in imperial academy. Nanjing imperial academy is located in Nanjing, namely "Nanyong", while Nanjing, the capital of imperial academy, is located in Beijing, namely "Beiyong".

After the Ming Emperor Judy succeeded to the throne, in February of the first year of Yongle (A.D. 1403), he changed Fu Xue in Beiping to imperial academy in Beijing. In November of A.D. 18 (A.D. 1420), it was ordered that imperial academy in Beijing be changed to imperial academy, the capital of Beijing, while imperial academy, originally in Nanjing, was called "imperial academy in Nanjing". In this way, in the Ming dynasty, the central official school appeared the situation that the southern governor and the northern governor coexisted. Imperial academy reached its peak in Yongle period, with more than 9,000 students at one time. It was the largest institution of higher learning in the world at that time, and then it gradually declined. After the Qing army occupied Nanjing, in the seventh year of Shunzhi (1650), imperial academy in Nanjing was changed to Jiangning official school, and Xianfeng was destroyed by the Taiping Heavenly Kingdom War.