Apart from technical references. You should more concenrate on cultural and language differences. Any project Manager faces problem when he is put into different culture. People have habit of using native words while speaking English, it takes some time to grep the accents also.
You said they are okay with English and they already know programming then it should Not be much difficult to teach them Perl basics. Only accents, culture are two things where you should concentrate more and ofcourse explain them your probelm Openly before you start your traning sessions. They (Chinease students) would also put more efforts to bridge cultural gap