What to do? I am UK citizen with Chinese wife

my wife is now living permanently in China caring for elderly and infirm parents. I live part year with her in China (Q2 visa valid for 2 year multiple entries, up to 120 days each visit) and part year in UK. I am 67 years old, have no teaching qualifications, but have been offered work as a 'conversational English consultant' at a local school. I am a self-funded retiree and have no need of a salary, and would only be available to assist the school on an occasional basis. Any suggestions? Thanks for your time