The exercises currently underway are being staged out of the PLAGF Training Base located at Lhari (30 38 18.28 N, 93 13 50.60 E) and the live-firing range is to the south of the Nyenchen Tanglha mountain range north of Arunachal Pradesh (30 35 42.88 N, 93 20 56.81 E).
The participating Z-10 attack helicopters and Mi-17V-5 utility helicopters are operating out of Nyingchi Heli Base (29 33 39.99 N, 94 28 15.67 E).
And here are the video-clips of the on-going exercises:
https://www.youtube.com/watch?v=a_YS8Kfd_Fs
Meanwhile, the Indian Navy's P-8I LRMR/ASW platforms have since June 20 been keeping track of a build-up of PLA-BDR and PLAGF forces along eastern Himachal Pradesh in the areas shown below.