Never moonlight.

You run the risk of deportatarion for tax avoidance if found to be moonlighting without paying tax on your second income.

(Case in point greedy FTs in Hainan employed by the public sector caught teaching and avoiding tax while moonlighting at language mills.)

No, always moonlight!

One shouldn't become a cringer, startled by your own shadow- are we men or mice? If you're a cringer women will pick it up and show you contempt. Get out there boy and do some 'unofficial labour'

Mind you, you don't have to broadcast it if you are doing unofficial labour- just you try and keep the odds on side. But deportation from bloody China is not exactly an insurmountable disaster.