It was two SU-27’s (Chinese version) chasing a U-2.
I’m sure not at the same altitude, but that’s still sort of impressive.
Chicom's SU-27's trying to intercept a Dragon Lady? FAS.org says Flanker flight ceiling 15,280 meters to 18,000 meters Chicom fighters would have to climb to >25,000 meters to catch the Dragon Lady...