His reddish brown hair is obviously the same.
Most balding men have gray hair - not William.
He rolls his sleeves up a lot.
Watch on left arm.
Was in China March 2015.
The man next to him could be a translator/security person.
The Royal Family has interest in a hospital in HK - Prince of Wales Hospital.
There could be human trafficking or selling of organs involved.
(Flown via United to SFO?)
Where is he going or coming from?
The biggest thing for me is the hair color - I haven't seen anyone else suggested with that same color.