In the early stage of practicing Lieyang Reincarnation Jue, the progress of practice will be very slow. For example, it may only take a year, or even half a year, or a few months for ordinary children of the nine major families to break through from Dou Zhe to Dou Master. After practicing the Lieyang Reincarnation Art, it may take ten or even twenty years for the top direct descendants of the Sikong family to break through from a fighter to a fighter, but, unlike ordinary people, their The speed of practice will increase with the breakthrough of the realm, maybe until the breakthrough of the Douwang

When fighting the emperor, it only takes a year and a half, and the later it becomes, the more obvious it becomes.

The only weakness of this technique is that the progress of the practice in the early stage is too slow, resulting in the lifespan not keeping up. Many direct descendants of the Sikong family died of old age.