FSC:Ningbo Yawen International Trading Co., Ltd na-agbaso FSC chọrọ nke yinye nke njide n'ihe gbasara ịzụrụ na ire osisi, achara na ngwaahịa akwụkwọ (FSC 100%, FSC mix, FSC Recycled).Nlele a gbadoro ụkwụ na ọkọlọtọ: FSC-STD-40-004 v. 3.0 FSC Standard for Chain of Cstody Asambodo.
GRS:Ningbo Yawen International Trading Co., Ltd na-akwado Global Recycled Standard(GRS) Version 4.0 nke ECOCERT GREENLIFE SAS nyochara.Otu ngwaahịa dị ka ekwuru n'okpuru (ma kọwakwuru ya na ngwa ngwa ngwaahịa) kwekọrọ n'ụkpụrụ: akwa akwa(PC0025).Otu usoro bu ọrụ anyị nke nzukọ a kpọtụrụ aha n'elu maka mkpuchi mkpuchi ngwaahịa agbakwunyere (PR0030).
TUV kwadoro:Ningbo Yawen International Trading Co., Ltd kwadoro site TUV Rheinland dị ka Gold Supplier na Alibaba.
