The 1500 meters had already entered the latter half.
The athletes had successively entered the fourth lap, but the gaps between them widened as their stamina waned.
By the time Pu Sangzhi reached the first bend of the fourth lap, she had already opened up a small gap with the second-place runner.
After three laps, only 300 meters remained. At that point, all the athletes' stamina would have been nearly depleted. If the gap between the first and second place was too large, it would be difficult to close.
Thus, as long as Pu Sangzhi maintained her distance from the second-place runner and kept up her current pace to the finish line, first place would surely be hers.
When Pu Sangzhi took the first-place position, Dai Shanshan unexpectedly found herself in last place.
As Pu Sangzhi ran past the second bend of the fourth lap, entering the final 200 meters, Dai Shanshan was still on her third lap.