C920 Ignite the Suspicion in One's Heart

At this time, the System suddenly agreed with Chu Dong's idea, and even admired him a little: "Host, you actually thought with your brain, I'm really surprised! However, I think that this is very possible. However, what I find strange is that since this is the case, they must have chosen a direction that is easy to exploit in order to enter or exit the underground cavern! After all