Awọn ọja Defu gba iwe-ẹri eto didara alaṣẹ ilu okeere, iwe-ẹri eto iṣakoso ayika, eto iṣakoso ilera iṣẹ, nitorinaa jẹ ki awọn alabara ni didara nla ati idaniloju aabo ni lilo awọn ọja.
Ni ọdun 2010, kọja iwe-ẹri eto didara ti German Rhine TUV TS16949: 2009
Ni ọdun 2014, kọja Guangdong zhongjian GB/t28001-2011 / ohsas18001-2007 ilera iṣẹ ati iṣakoso ailewu
Ni ọdun 2014, ile-iṣẹ naa ti kọja Guangdong zhongjian GB/t24001-2004 / iso14001-2004 ijẹrisi eto iṣakoso aabo ayika.