After being accidentally reborn in Douluo Continent, Qingyu discovered that there were still decades before Tang San was born. Born into a family of spirit masters under the Spirit Hall, he did not have many choices but to join the Spirit Hall. In order to avoid the future destruction of the Spirit Hall, and also for his own sake, Qingyu began the Spirit Hall transformation plan.
Di Hong traveled through time and ended up in the Douluo Continent.
The good news is that he is the fourth prince of the kingdom, the son of the king.
The bad news is that he traveled through time too early, several decades too early.