I haven’t had the mandatory testing yet. Not happy about the mandatory testing one bit. I read where United and American Pilots are refusing to fly there due to the testing aspect. Crickets from our Union on this matter so far.
I deadheaded commercially into hkg recently and there is an online health declaration to complete. Take a screenshot of the code after you submit it. There was a FedEx agent that met us after we got off the jet and we followed her lead.
Good luck!