Hmmm...so the unit at Wuhu is THE one named after PLAAF (PVA) ace Wang Hai?Happy ten year anniversary since first flight!
Video included some new footages and mostly rehashed old info with the exception of one reveal: J-20 has reduced its weight by 200KG during the developmental process.
Yankee's article reveals that a J-20 from Wuhu has destroyed a target drone during RedSword-2019.
The unsung heroes behind the development and construction of J-20. One interesting tidbit is that 3D printed parts are used on the J-20.