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. Ụdị ngwaahịa dị ka ekwuru n'okpuru (ma na-akọwapụta ya na ngwa ngwa ngwaahịa) kwekọrọ n'ụkpụrụ: Ejiri akwa (PC0025). Usoro usoro bu anyị n'okpuru ọrụ nke nzukọ a kpọtụrụ aha n'elu maka ngwaahịa mkpuchi azụmaahịa (PR0030).
TUV kwadoro:Ningbo Yawen International Trading Co., Ltd kwadoro site TUV Rheinland dị ka Gold Supplier na Alibaba.
