Lin Chuxia was very familiar with Gu Yuheng's voice, so much so that she could distinguish it even when he was just coughing.
She hurriedly ran in the direction of the sound and, sure enough, she found Gu Yuheng behind a large stone by the riverbank, half-submerged in the water.
Gu Yuheng was already close to passing out before he fell into the river. The huge impact upon hitting the water didn't knock him out; instead, it made him slightly more alert.
He knew that to survive in the water, he had to stay conscious. It was probably his strong will that allowed him to adjust his body position with the current after falling in.
However, he had barely managed to crawl to the shore when he exhausted all his strength.
Thinking that he was out of danger and that all he had to do was wait for Lin Qingze and the others to rescue him, he didn't mind that most of his body was still soaking in the water and simply lay on the big stone, letting himself pass out with relief.