Fang Yuxin and Bai Ye were driving over when those cars had already been surrounded by a Zombie Group. The car doors were entirely blocked by zombies, and the people inside simply couldn't get out, the situation was utterly passive.
The zombies' claws were fierce; they quickly scratched through the tightly shut car windows and then stretched their claws to grab the people inside, intending to pull them out.
Through the Spiritual Sense she released, Fang Yuxin "saw" that the people inside were already scared and tightly huddled together, desperately squeezing towards the middle of the seats to avoid the zombies' claws.
These people were not very strong; they probably had been hiding in a Safe Zone before. Their emergence must have been due to some incident in their Safe Zone.
Fang Yuxin and Bai Ye guessed in their minds but before they got closer, Bai Ye parked the car on the roadside, and both of them instantly opened the car doors and dashed out.