Nrog rau kev nce qib ntawm kev loj hlob hauv nroog tsis tu ncua, muaj ntau thiab ntau qhov kev tsim kho pov tseg nyob rau hauv xyoo tas los no, uas tau ua teeb meem rau lub nroog tswj hwm. Tsoomfwv tau maj mam paub txog qhov tseem ceeb ntawm kev kho cov khoom siv pov tseg; Los ntawm lwm qhov kev xav, kev tsim khoom pov tseg kuj yog ib hom kev nplua nuj. Tom qab honcha cib ntau lawm kab, nws tuaj yeem dhau los ua cov khoom siv phab ntsa tshiab hauv cov khoom siv luv luv hauv lub sijhawm niaj hnub no thiab siv tag nrho cov peev txheej.

Fly tshauv yog cov pa phem tshaj plaws rau ib puag ncig. Hauv Suav teb, cov khoom tsim tawm mus txog ntau txhiab tons, thiab feem ntau ntawm lawv tsis siv, uas tsis yog tsuas yog siv cov khoom siv pov tseg xwb, tab sis kuj ua rau muaj kev ua qias tuaj ib puag ncig. Qhov tseeb, ya tshauv kuj yog ib qho khoom siv zoo rau kev cib. Tom qab honcha cib ua cov kab ntau lawm, nws kuj tuaj yeem dhau los ua cov khoom siv phab ntsa tshiab hauv cov khoom siv luv luv nyob rau niaj hnub no, uas tau siv tag nrho.

Tsis tsuas yog siv pov tseg, ya tshauv, tailings, hlau smelting thiab lwm yam khoom pov tseg, Lei Shi Chengxin cov khoom siv khib nyiab unburned cib tshuab tuaj yeem hloov pov tseg rau hauv cov khoom muaj nqis, thiab cov khoom tsim "tus me nyuam" kuj tseem siv tau rau kev txuag dej, phab ntsa, hauv av, vaj thiab lwm yam!