susanhasbeendreamingtotakeatripinlijiangforalongtime.thesedaysshegotachancebyaccidence.shewasoutofjoy.shewouldlikeinvitehergoodfriendmarytogowithher,butmaryrefusedatthebegining.altoughmaryisstubborn,shefinallybepersuadedbysusan.duringthistrip,bothofthemhaveagoodtime.besides,theygetknoweachotherbetter.especiallyforsusan,shefindthatmaryactuallyiseasytogetalongwith,