Qhia cov tub ntxhais kawm ua ib puag ncig gestures, qhia ib puag ncig cov cuab yeej thiab cov cuab yeej, cov tub ntxhais kawm ntawv qib siab mus rau hauv qhov chaw soj ntsuam huab cua... Nyob rau hnub ua ntej ntawm Lub Rau Hli 5 Environment Day, ecological ib puag ncig System ntawm Xi 'an, Shaanxi Province, muaj ntau yam.. .
Nyeem ntxiv