Having put on the guise of the Buddhist faith, the subsequent matters became much easier.
All he needed to do was have everyone believe in Jiang Chen's Buddhist Law, that he possessed demon-slaying and demon-suppression abilities, then he could almost start his preaching plan.
As for how to make everyone believe?
That was even more simple - just manifest divinity in public.
As long as everyone witnessed the power of the Great Majestic Heavenly Dragon, even if Jiang Chen did not speak, there would be people crying and begging for him to impart his Divine Ability.
That's just how people are - what's easily gained is often overlooked, only things that are hard-earned will be highly valued.
So, if Jiang Chen were to preach, he definitely could not be proactive. He needed to maintain a lofty image and only reluctantly bestow the Divine Ability after the crowd's heartfelt begging.