It would also be a good idea to ask for the email addresses of other FTs who work there or who have done, just recently.

I think jobseekers shouldn't put much weight on what they can find out by sending e-mails to e-mail addresses supplied to them by potential employers.
There are unscrupulous foreigners teaching in China who will take monetary bribes or good dinners from employers in return for lying to newbies so that employers can fill their vacancies!