He graduated from Nanjing Normal University in 1982 , and became a teacher at Changzhou High School .
In his early career , Mao worked for a visual arts academy in the city of Changzhou .
Mao graduated from Nanjing Normal University in 1982 , and became a teacher at Changzhou High School .
In his early career , Mao worked for a visual arts academy in the city of Changzhou .