C326 The ten hades

If not for the letter in Xiao Lianshan's hands, even if we found the entrance, we would not have been able to do anything. We have to admire Hong Xuzi's ingenious mechanism, according to the detailed records of the mechanism in the letter, Xiao Lianshan carefully opened the mountain wall that had been closed for hundreds of years, and a pitch black long tunnel appeared in front of us