As for the reason... the tires overheated and degraded.
At the same time, after Perez was overtaken by Sainz, Qin Miao also started to accelerate again.
Moreover, Qin Miao was not at all worried that Sainz, who was behind him, would pose a threat to his position.
Mainly because Sainz was using medium tires at this time. He's not Qin Miao, and although it is possible for Sainz to finish the race on these medium tires, his speed will definitely drop significantly towards the end.
The only way to avoid this situation is to pit and change tires.
In any case, Sainz posed no threat to Qin Miao's position at this time.
Sure enough, on lap 43, Sainz pitted and changed to another set of medium tires, and when he came out of the pit lane, Sainz fell behind O'Kang.
Now Sainz's only advantage is this new set of medium tires.
Ferrari is counting on Sainz having Qin Miao-like aggressive capabilities, using this ability to climb more positions.
