The so-called method of leaving had to be found in the Heavenly Book, obviously because this page of the Heavenly Book dealt with light.
The previously seen mirage over Tianya Island, after all, reflected the scenery of the Heavenly Vault, one of the most typical effects of light.
Including blocking the prying of the blind and the ultimate teleportation here, everything relied on the distortion of light—this last teleport had made Zhao Changhe doubt whether it was related to space. It turned out that teleportation of this kind could be managed with related arrays without the need for high-end spatial laws. This page of the Heavenly Book had nothing to do with space; it was all about light.
But knowing it was light and being able to use it were two different things.
Zhao Changhe had already tried using light, having learned the Water Mirror Technique, so he was not starting from scratch, which meant understanding was not a huge barrier.
