Sunburn:

Good on ya for raising the BS flag and keeping the rest of us safe. I had a similar experience years ago on a domestic carrier. I complained twice to the head Stu before take off, and the carrier pulled off the taxiway to deice. I was later thanked by the captain. (Ground crew had lied to flight crew that plane was deiced when it was not. I witnessed the entire affair).

I would file a complaint with the FAA since CZ flies into the US. I would also be careful when going thru China as they may find some way of retaliating against you. Might want to contact the embassy and consulate in PVG and CAN in case they come knocking on your hotel room in the middle of the night. Let them know what happened. Get a local phone number in case. Don't go anywhere in Chicom without a wingman.