Yuhuang Electronics Dongguan Co., Ltd, monga katswiri wodziwa bwino ntchito yolumikiza zida, yomwe idakhazikitsidwa mu 1998, yomwe ili ku Dongguan City, malo odziwika bwino padziko lonse lapansi ogwiritsira ntchito zida zamagetsi. Amapanga zida zolumikizirana mogwirizana ndi GB, American Standard (ANSI), Germany Standard (DIN), Japanese Standard (JIS), International Standard (ISO), Komanso, zida zolumikizirana zomwe zimakonzedwa kutengera zomwe mukufuna. Yuhuang ili ndi antchito aluso oposa 100, kuphatikiza mainjiniya 10 aluso ndi ogulitsa 10 odziwa bwino ntchito zapadziko lonse lapansi. Timaika patsogolo ntchito ya makasitomala.