Aia ma Ningbo, ke kūlanakauhale kahakai kaulana me kāna ʻoihana waiwai ikaika, ʻo Yehui ke hana a hoʻokuʻu aku i nā ʻano huahana like ʻole a me nā lawelawe o ka paipu, nā mea maʻemaʻe, ʻōnaehana hoʻomehana, laina hoʻomaʻemaʻe wai. Loaʻa i kā mākou huahana nā ʻano valve āpau, nā mea hoʻohui, nā huila, nā ʻauʻau, nā lako lumi lumi, HAVC a pēlā aku. Hāʻawi pū mākou i kekahi mau mea hana hanohano ma waho o nā ʻāpana hilinaʻi no ka hui ʻana. Hana ʻia nā huahana holoʻokoʻa me ke keleawe, keleawe, zinc, alumini alumini, plastic, rubber, steel and stainless steel, etc. Loaʻa nā ʻano like ʻole no kāu koho.