There is a study in Qingshi called Qingpingzhai. The boss of Qingpingzhai is called Zhouyuancao, which is taken from Liliyuan Shangcao. Zhou Yuancao has a book, which was left by his ancestors. It contains many past events in the world of mortals. Every rainless evening, he would light the soul-inducing incense and use a page in the book as a guide to look back in time. "In the spring, the breeze rises, and the swallows return to their hometown. Travel notes of a cowboy, life events. Monster events, ghost events, impermanent events. What happened today..."