I think I've found the place. It's lingshui. 18°29'41"N 109°59'21"E
that particular photo was taken on 10th May this year, and are in service aircraft.
Considering that, and considering the Shaanxi 4 KQ-200 4 KJ-500 photo was taken on 16th May this year, I do believe all of the aircraft in the photos are probably all unique airframes. It means there is a minimum of 8 confirmed in service or to be delivered Y-8Q airframes (four at Lingshui in this photo, four at Shaanxi). But I'm not sure if there are any other, or if the ones at Lingshui are meant to be the first KQ-200 unit.