<□□□fte□ a s□ries of □wists□and tu□□□, □hallenges and □□rrow esca□e□, Li Lei and H□□ Meimei finally reac□e□ the heart□of th□ tu□nel, w□ere th□y□made a discovery that □eft□t□□m speec□l□ss. The an□ient re□ics □nd cr□ptic symbols led to a s□cret □hamber□t□at he□d a tre□□ure beyond thei□ □□ld□□□□dreams. A□ the□ gazed □n awe at the r□c□e□ before them□ the□ □□alized that the□r new advent□re had not□only test□□ their□courag□ and□friendship but □□d □lso□□□□ught □hem□closer t□g□ther in way□ □he□ never □m□gined□possib□e.