Hoʻokumu ʻia i ka makahiki 1999, ʻo Qisheng i kēia manawa aia ma luna o 200 koʻokoʻo a me ke kaʻina o nā hana i mua, ka hoʻāʻo a me nā lako pono hale hana. ʻO kā mākou huahana nui e komo ana i ka paukū kāpili extrusion, kaukini paukū paukū, kaukū silikone, kaukini fluorosilicone a me nā huahana moʻo ʻē aʻe, noi nui ʻia i nā kahua o nā kalaka, nā kaʻa, nā kaʻa kaʻa, nā kaʻa ʻenehana, nā kaʻa mahiʻai, nā kaʻa koa a pēlā aku.