'I don't even smoke, do I? And Yunzhong City isn't the Capital City. The mountains are green and the water is clear, so there isn't much smog. How could there be so much gunk in my phlegm? This doesn't make any sense, does it?' Shen Yibin was a bit confused, but then it hit him. While it was true that he didn't smoke and Yunzhong City didn't suffer from serious air pollution, he still drove everywhere. He was bound to encounter some car exhaust, and over time, it was inevitable that some filth would build up in his lungs.
He had just learned a breathing technique from the Turtle Immortal. By inhaling fresh air and using the movements of his chest and lungs, he had expelled some of the harmful particles from inside them. That was why the phlegm he'd coughed up contained those impurities, and why his chest and lungs felt so much clearer afterward.
