Sodium sulfide hmannak ah a har deuhmi thil sining aa tel. Hmanthlak thlennak riantuannak ah, riantuantu hna cu chemical a tei khomi thilthuam in rian an ttuan, zeicahtiah sodium sulfide nih a lin tukmi ah a thurhnawmmi thli a chuahter. Ti thurhnawm thianhnak sehzung hna nih thir rit pawl chuahternak caah an hman tawn, cu nih cun rawl peknak rate kha fek tein uk a hau i rawl peknak pipe pawl kha anti-crystallization thilri in chiah a hau. Cauk sernak sehzung ah, thing hnah nemternak caah hmanmi ah, riantuannak hmun cu a ro tein chiah a hau, vawlei ah a tlik lonak ding caah hnipuan chiah a hau i vampang ah “Ti hrai hman khawh a si lo” tibantuk ralrin peknak catar tar a hau.

Qingdao tilawng dinhnak, Tianjin tilawng dinhnak le Shanghai tilawng dinhnak in direct in kuatnak, vawleicung pumpi tilawng dinhnak ngan pipi a khuhmi sodium sulfide ttha tein kuatnak he. A ttha ngaimi riantuannak hmuh awkah hika hi hmet.