An kafa Donsen a cikin 1996, wanda ke cikin NINGBO inda babban birni mai tashar jiragen ruwa ya ci gaba kuma mai kyau. Samun gwaninta fiye da shekaru 10 a cikin wannan filin, muna ɗaya daga cikin ƙwararrun masana'antun da suka ƙware wajen samar da bututun filastik don samar da ruwa da tsarin ban ruwa.

Babban samfuranmu sune bututu da kayan aiki na PP-R, PP matsawa kayan aiki, bututun C-PVC da kayan aiki, bututun U-PVC da kayan aiki, bututun dumama na PE-RT, ƙirar filastik da kowane nau'in bawul ɗin filastik. Misali: bawul ɗin PVC, bawul ɗin PPR, bawul ɗin C-PVC, bawul ɗin BRASS.