<□□Li Lei□and Han Mei□ei were □wo adventurous□so□ls who□al□ays sought excitem□nt an□ thr□ll i□ t□e□r lives□□They□were best frie□ds sin□e c□ildho□d an□ sha□e□□□ passion for exploring the unk□□wn.□One□□ay, a□ they were □i□□□ng □nder t□e old□oak tre□□in□the park,□Han Meimei□□ad an idea □hat would l□ad them □□ a□new adve□tur□ th□□ they woul□ n□ver □orget.