This was purely a joke. Tang Zheng was a nice guy, but he was not so gentlemanly that he would let someone else use his warm sleeping bag, even if it was for a pretty girl. In this life in the isolated Solitary Island Forest that he didn't know how long he would have to survive, Tang Zheng would do everything possible to keep his body in optimal condition and didn't allow any mishaps.
However, Zhang Yan didn't seem to think the same way. After some hesitation, she seemed to make up her mind. She quietly stripped off her sportswear, wearing only her underwear, she squatted next to Tang Zheng, lifted a corner of the sleeping bag, and slowly crawled inside.
Tang Zheng was stunned. From his perspective, he could fully see the girl's entire curves. Before he could say anything, the girl was already snuggling into the sleeping bag.