Hoʻohana nā huahana Defu i ka palapala hōʻoia ʻōnaehana mana mana honua, hōʻoia ʻōnaehana hoʻokele kaiapuni, ʻōnaehana hoʻokele olakino ʻoihana, i hiki i nā mea kūʻai ke loaʻa ka ʻoi aku ka maikaʻi a me ka palekana palekana i ka hoʻohana ʻana i nā huahana.
I ka makahiki 2010, ua hala ka palapala hōʻoia ʻōnaehana maikaʻi o German Rhine TUV TS16949: 2009
I ka makahiki 2014, ua hala i ka Guangdong zhongjian GB/t28001-2011 / ohsas18001-2007 ka mālama ola a me ka palekana.
I ka makahiki 2014, ua hala ka hui iā Guangdong zhongjian GB/t24001-2004 / iso14001-2004 hōʻoia ʻōnaehana palekana palekana.