Ko Yuhuang Electronics Dongguan Co., Ltd., he tohunga ki te whakarato i ngā otinga whakapiri ritenga, i whakatūria i te tau 1998, ā, kei roto i te Tāone o Dongguan—he pokapū rongonui o te ao mō te tukatuka wāhanga taputapu. Ka hangaia e mātou he whakapiri e tutuki ana i ngā paerewa maha, tae atu ki te GB, te Paerewa Amerikana (ANSI), te Paerewa Tiamana (DIN), te Paerewa Hapanihi (JIS), me te Paerewa Ao (ISO). Hei tāpiri, ka tukuna e mātou he whakapiri ritenga kua hangaia kia rite ki ō hiahia. E whakamanamana ana a Yuhuang ki tētahi tīma neke atu i te 100 ngā kaimahi pūkenga, tae atu ki te 10 ngā miihini ngaio me te 10 ngā kaimahi hokohoko o te ao. Ka tino whakanuia e mātou ngā ratonga kiritaki, ka waiho hei kaupapa matua i roto i ā mātou mahi.