Pengxi County, Suining City ndi malo a "Red Sea of China".Malo opangira zimbudzi m'dera lathu amagwiritsa pH mita, ORP mita, fulorosenti kusungunuka mpweya mita, turbidity mita, sludge ndende mita, akupanga mlingo mita ndi angapo angapo mamita.Mamita a sinomeasure amapereka "maso" awiri kuti azindikire zofunikira pazitsulo zamadzimadzi ndikuwonetsetsa kuti zowonongeka zimafika pamiyeso yamakampani.
