ʻO Laizhou Dongsheng Valve Co., Ltd. he mea kanu valve ʻoihana, he hōʻiliʻili o ka noiʻi a me ka hoʻomohala ʻana, ka hoʻolālā, ka hana ʻana, ke kūʻai aku ʻana o ka hui kūikawā i hoʻohui ʻia mai 2002. Hoʻopaʻa mākou i kahi pūnaehana ʻepekema a me ka ʻōnaehana hoʻokele koʻikoʻi, ikaika ʻenehana ikaika. , nā lako hana hoʻolālā kiʻekiʻe a me ka holomua ʻenehana kūpono, nā ʻenehana kiʻekiʻe a me nā ʻenehana maikaʻi a me nā limahana.ʻO kā mākou hale hana he 30,000 mika square a he 148 mau limahana.Ma hope o 20 mau makahiki o ka nānā ʻana, ua hoʻomohala mākou i kahi kahua hoʻokumu ʻana i ka valve check valve kaulana, a lawe ʻia kā mākou huahana i ʻEulopa, ʻAmelika, ʻApelika, Hikina Hema, Australia a me nā ʻāina ʻē aʻe 70 a me nā ʻāina.