It is easy to meet girls but as soon as they find out I
am "just a teacher" they lose interest. It seems everything here is only about
money. Being handsome and fit seems to count for nothing. Is it really like this
everywhere in China?

Nothing is like anything EVERYWHERE in China, despite the responses you are likely to receive from the misogynist chorus below.

It is generally true, however, that the vast majority of young Chinese women view 'dating' as an interview for marriage, unlike young people in Western countries for whom dating is, well, dating.

Being 'fit' for marriage is a cultural construct. In China, a foreigner without assets or residency is judged as not fit for marriage by young women who are educated and unmarried.