Supposing some school did offer you a job and you did feel like working once again, would it be possible for you to change your status and get a working permit, or would you have to leave and re-enter the country?

Is it against Chinese law to work after 60 or is it just that they won't offer you a job at that age? What about somebody like Turnoi with all his doctorates and knowledge of ancient and modern Chinese; surely they wouldn't say to him 'piss off you old wanker, you're over sixty?' (No disrespect Turnoi, just making a point. I am sure your eyesight will always be sharp as a hawk.) Or is it one rule for an ordinary FT and another for a top professor?

Following the information you've given me so far I'm getting a bit nervous of embarking on illegal teaching. The thing is I have attained 61 and not really a teacher. On the other hand my training centre says Oh contrary you are a good teacher.

I think I would go mad in China without work to do. Supposing I was silly enough to think that fish&chips with curry sauce and mushy peas would sell down the market; would they say you can't have a license on account of being 61?

You'd have to leave and re-enter.

I believe it's illegal to work after 60, but that law might mot be applied universally. If you are 60 or over 60 and working on a work RP, you'd be legally employed.

Chinese employers, especially training centers, tend not to tell the truth if they are desparate for FTs.

Some westerners live to work. Not me, so I don't mind doing nothing.
I suppose it would be ok to be self-employed selling fast food in a market, or get into some Chinese charity organisation as an unpaid volunteer.