The Chinese TV shows the damage to the P3 and the conclusion is that the P3 turned toward the F8, striking it from behind. For proof, they show that the damage on the left prop is on the forward face of the prop, and there is no mark on the rear. The antenna on the left wing is bent back, not forward, and the marks on the fuselage from the F8 stab shows that the P3 was running over the F8. This info may or may not show what they claim, but even if it does, the airplane formating has the duty to keep clear, and the F8 should have been able to avoid the bigger airplane, even at the low speed when it would be presumed the fighter would have had limited maneuverability. The Chinese airplane should have stayed clear even if the P3 had tried to "run them down".
Nevertheless it is damaging stuff; if they are right, how much else are they right about? It will be interesting to hear the spin the "US Side" puts on this.