Her Chinese colleague always said to her ：“Welcome to my home , when you are free!”. But, half year has passed by, the American teacher has not gone her home. So the Chinese colleague said to the her again :“Welcome to my home, when you are free! If you don’t have time, calling for me and everytime will be ok!”. A year later, the American teacher haven’t give a call or come to visit the Chinese colleague. Strangely, the Amercian teacher has always been in trouble for having no body visiting her.