Just□as Li Lei and □an Me□mei thought□they had seen everyt□ing the □ansion ha□ to o□fer, t□□y□stumb□ed upon a hid□e□ tr□pdoor in t□□ □loor. Wit□□hear□s □o□nd□ng, th□□ opened□t□e □rapdoo□ and d□scended into a d□□k, musty tunnel □elow. As they na□ig□ted □h□ough□the winding □assages, the dim lig□t of their flashlight reve□l□d ancien□ □rtif□cts and crypti□ sy□□ol□ o□ t□e walls.□The further they □entu□e□, the □ore t□ey r□alized the□□were no□ alo□e □n the tunnel□