Yakhazikitsidwa mu 2004, yomwe ili ku Qingshan Industrial Park mumzinda wa Hangzhou ku China, HZ DRYAIR yakhala ikupereka njira zophatikizira zachilengedwe ndi machitidwe omwe amagwira ntchito bwino kwambiri pa zida zankhondo zaku China ndi zakuthambo komanso ntchito zina zambiri za anthu wamba kwazaka zopitilira 10. square metre ndipo ali ndi antchito opitilira 160, omwe akuphatikiza mainjiniya akuluakulu 5, 1 digiri ya udokotala, 5 omaliza digiri ya Master.