1) shows the little French people's understanding and sympathy for Mr. Hamel. Because Mr. Hamel, a French teacher, is about to be forced to leave the classroom and leave the school and education he loves, Xiao Fa thinks he is a "poor man".

2) "Poor" means that Mr. Hamel loves the language of his motherland so much that he can't teach his knowledge to his children in the future, so he is "poor".

3) "Poor" means that although Mr. Hamel is infinitely attached to the campus and home where he has served and lived for 40 years, he has to leave, so he is "poor".

4) As a French student, little Franz didn't learn French well, and he didn't have a chance to learn the language of his own country in the future, so Mr. Hamel also called him "poor".