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