I will Teach?

Hazy Dream Grass, as its name implies, it's a sedative type medicinal herb. It's only a grade one herb, with pretty much no use. Yang Shi bought it because he got a strange idea in his mind. These Hazy Dream Grass can be concocted into a special elixir, which has an astonishing effect on meditation.  Yang Shi laughed smugly as he thought about another thing. He remembered his past on Earth. He was a heavy chain smoker and drinker. His life was very gray, so he couldn't help but became an addict.