Incidentally, even though Zheng Zetian has been cultivating this protective black lotus for a short time, making it impervious to blades and fire, he estimates that if he could wield the power of the Three Tribulations Heavenly Thunder, he might be able to blast through the lotus head-on. In other words, with this lotus for protection, passing through the first two thunder tribulations shouldn't be a problem. In any case, once his thunder techniques are fully mastered in the future, he could study it more carefully…
"Is Brother Song here?"
Just as the master and disciple were discussing the cultivation of thunder techniques, someone visited, momentarily interrupting their practice.
