一个不输本金的教程简介：Ahem, class is on, and Old Man Yan is here! A classmate sitting by the window reminded the class and told them to quiet down. Monitor Li Tao also came out to maintain discipline.
Ahem, class is on, and Old Man Yan is here! A classmate sitting by the window reminded the class and told them to quiet down. Monitor Li Tao also came out to maintain discipline.
