On September 16, Lin Ju in Qiongzhou received a gift from the Space Administration.
A palm sized alloy J-20 plane model should be laser cut in shape, with high-temperature ablation and oxidation marks on the edge. The whole model is silvery white and looks dirty like falling ash, but it can't be wiped off. It is the color of the material itself.
Four numbers 2201 were also printed on the metal surface with a laser, apparently belonging to the number of the verification machine.
The gift giver said, "This is the J-20B model given to you by Chief Engineer Yang Wei, which was cut from the main beam of the airframe."
Have a go