from the USA-China meeting

There's 0% chance this is from the meeting.

This video from the white house twitter account shows trump getting off the plane in Beijing, posted at 12:16 PM UTC. This tweet was posted live. Notice Trump is wearing a blue tie when he gets off the plane.

https://xcancel.com/RapidResponse47/status/2054535403189772646#m

https://xcancel.com/RapidResponse47/status/2054536370249445590#m

This tweet contains the image which you shared. It was posted at 12:08 PM UTC, 8 minutes before the White House posted the video of Trump getting off the plane. Notice Trump is wearing a red tie.

https://xcancel.com/ChoWeili34235/status/2054534336029061318

I recall seeing the image in the OP hours before Trump even landed in China but I can't find it now.

Also "特朗普 黄仁勋 马斯克宣誓加入中国共产党" translates to "Trump, Jensen Huang, and Elon Musk Swear Allegiance to the Chinese Communist Party"