An injury ended Zhang Zhiqiangs dream of becoming a professional basketball player, so he became a physical education teacher. To impress the new young math teacher, he volunteers to teach the problem class of the school in math.
1995
2001
1956
1997
2002
1991
1948
1999
1917
1966
1918
2006
2014
2013
1993
2010
2008
