Nanjing Tong Chang anviwònman teknoloji co, Ltd.
Pa travay ak dirijan ekip R&D lakay yo ak aletranje, TongChang devlope yon kantite patant teknik.Gade pou pi devan pou etabli relasyon koperasyon alontèm avèk ou.
LinkedIn:https://www.linkedin.com/company nanjing-blue-sky-filter
Twitter:https://twitter.com/BlueSkyFilter
Youtube: https://www.youtube.com/channel/UC5Khydiru5QdeYmnzFjuHAA
