In a world of great contention, human life is like grass, and in the last years of the dynasty, wars are raging everywhere. The feudal lords rule separately, and catastrophes continue for years. The bustling world is deserted for a while, and there is no rooster crowing for thousands of miles. They are about to return. They are either legends or myths... In this great world, in a small border town, Yang Yu looked up, only to see dark clouds billowing, and a rainstorm approaching... There are old books 'Projections from the Heavens' and ' 'Da Dao Ji', friends who like it can go and see it.