Nanjing Tongchang Environment Tech Co., Ltd. tau tsim nyob rau hauv 2018, nyob rau hauv Nanjing, JiangSu Province, uas yog nyob rau hauv Shanghai Economic Circle.Peb lub lag luam tseem ceeb yog kev tsim khoom thiab muag khoom ntawm huab cua thiab dej purification equipments thiab lawv cov khoom txhawb nqa.