What couldn't fly on 9 th and 10th of May were Chinese jets. Pakistan had to hid it when India bombed 21 air strips and air bases in Pakistan. None of J10 or JF 17 flew to interceptors Indian jets. It bombed Pakistani sites and air bases like target practice. As I said, they are made to bomb Uighus and Xinxiang Muslims. It is not made to fight enemies. In war time, hiding them becomes major issue.