Yantai Dng Ortivary Ofesi ya Counry Co. DNG ali ndi mphamvu zolimba ndi zopangidwa mwamphamvu, zomwe zimathandiza kupanga nyundo zosiyanasiyana zamitundu yosiyanasiyana, monga machitsetse, ma pisitoni, kutsogolo ndi pini ina, ndi zinthu zina zothandizira. DNG ili ndi mbiri yoposa zaka 10, ndipo fakitale imadutsa iso9001, iso14001 ndi chiphaso cha EU C.