Under the siege of the Sunset Sword Sect, nearly all the disciples of the Taiyin Divine Sect brought by Wei Feiren were killed. When Wei Feiren realized something was amiss, he hastily used the teleportation talisman given to him by the Leader of the Taiyin Sect.
After all, Wei Feiren was a core Elder of the Taiyin Divine Sect, with means to save his own life.
After Wei Feiren escaped, Li Yu did not pursue him, as their main task was to kill Prince Lu Yi and completely dissolve the power he had gathered.
As for annihilating the Taiyin Divine Sect, that would have to wait until their young master issued the order.
After Prince Lu Yi's death, the forces he had gathered quickly dissolved, and the majority chose to surrender to Great Sum.
People also realized that the tide had turned; if they continued to struggle against the new emperor, they would surely face destruction.
A few days later, a ragged Wei Feiren returned to the main base of the Taiyin Divine Sect.