Only after Haodu finished explaining did Yang Chen begin to trust him.
Why?
Because to be precise, Yang Chen was quite familiar with the route to leave the Giant Beast Clan.
He still remembered the memory of Lu Daren of the Giant Beast Clan. In that memory was the route to leave the Giant Beast Clan. Following this route, he could find the main road to leave the Giant Beast Clan.
But he still wanted to ask Haodu, just to test him and see if he was genuinely submissive.
Now it seems that Haodu was indeed submissive.
Yang Chen was quite surprised, but quickly accepted this fact. Alien tribespeople were also human. The Giant Beast Clan people were very intelligent, and intelligent people were often afraid of death. Haodu must be one of them.
So this way, Yang Chen put Haodu into the Demon God Tower and planned to escape from the Giant Beast Clan according to the route.
The first half went well, but as they went further, Yang Chen began to feel the difficulties.