Just as Li Lei and□□an Meim□i thou□ht□th□y ha□ s□en□everything □h□□□an□ion h□d □o offe□, they stumbled upon a hid□en trapdoor in □□e floo□□ With hearts□pounding, they opened □□e trapdoor a□d□descended into □ d□□k,□mu□ty tunnel belo□. □s the□□na□igated through th□□wi□ding passage□, t□e□dim li□ht of t□e□r□flashl□ght□revealed □nc□ent artifac□s and□cr□ptic□□ymbols□on the walls. The fu□th□r □hey v□ntur□□, the mo□e□they re□li□ed th□y wer□ not a□one in the tu□nel.