Chen Ke descended the stairs and entered the corridor, three people wide. Judging by the extent of the stairway, the space below was enormous.
Chen Ke walked downward for over half an hour before the ground began to level out. The broad corridor led to several passages, the further in he went, the larger the space, and the echoes of his footsteps were somewhat distracting.
"Is anyone there? Hello?" Chen Ke tried calling out.
His hoarse voice followed the corridor and was then devoured by darkness. As he continued forward, the small lights on both sides of the passage lit up with his footsteps. Written in Chinese characters on the walls read "Emergency Escape Corridor," with red background and white lettering, which felt particularly cordial.