Zhuo Ying and Feng Youjia couldn't stay still in the water; they would freeze to death that way.
They could only resist the cold by desperately moving their hands and feet.
This trip, they had achieved their goal, and they must leave quickly.
Taking advantage of the cover of night, the two of them slowly swam downstream with the current.
The speed downstream was certainly faster than their swim upstream.
When both of them emerged from the bone-chilling river, they were nearly frozen solid.
At times like this, stopping would absolutely lead to freezing to death.
Fortunately, they had already identified a route upon entry, so their retreat was very smooth.
Once they left the mine and returned to their car, they immediately took off their wetsuits and changed into dry clothing.
It wasn't until they got back to the car and turned on the heater that they finally felt alive again.