<□>□fte□ □ □er□□s of twists□and □u□ns, challenges and narrow escapes, Li Lei and□Han Me□mei fina□ly□□ea□hed □he heart of the t□n□el, where □hey made a □iscov□r□ □ha□ left□them□spe□chless. The ancien□□□e□ics and cr□ptic sym□□l□ led to□a sec□et□cha□be□ tha□ held a□t□e□sur□□bey□nd their w□ldest □ream□. As they g□zed in awe a□ □he □ich□s be□□re them, they rea□ize□□that their□new □dventure h□d not only tested their c□□rag□ and f□iendshi□ bu□ h□□ also b□ought them closer together i□□ways they□nev□r im□gined poss□ble.□>