Ntawm Yongli's, peb muab ntau yam khoom ua si kawm rau cov menyuam yaus hnub nyoog sib txawv.Los ntawm peb cov tswv yim tshwj xeeb thiab tshiab, peb tsim cov khoom ua si uas txhawb cov menyuam kawm ntawv thiab tshawb pom.Qhia koj cov me nyuam txoj kev daws teeb meem, txhawb kev loj hlob thaum ntxov, txhawb kev kawm, nthuav dav kev txawj xav los ntawm peb cov khoom siv kev kawm zoo.