鸟儿的歌声
<□□Li□□ei and□Han Meimei□were two adv□n□ur□us soul□□who al□ays sought□excit□men□ □□d thr□ll in their lives. They were □est fri□□ds sinc□□childh□o□ and sha□□d a pass□o□□for e□plor□ng the□unk□ow□.□One d□y,□as□they wer□ sitting under the old oak tree□in the p□□k, Han□M□□mei□had an idea that would □ead□them o□□a □ew adventure□that they would never for□□t□