□p>Just as Li Lei an□ Han □eim□i thou□ht they had seen ev□rything the ma□si□n h□□ to of□er,□t□ey□stum□le□ up□n□a h□□den□trapdoor in □he □□oor. With□heart□ po□n□i□g,□t□ey opene□ the trapdoor □nd□descended□into□a dark, mu□ty tunnel below.□As □hey na□□gated thr□ugh the w□nd□□g□pa□□□g□s, the dim light □f□their flash□i□ht reve□led □nci□nt arti□acts and cryptic symbo□□ on the□wall□□ The further□they ventured, the more t□ey realized they wer□ not a□o□e in □he□tunnel.