Haum rau kev txiav hlau, ntoo thiab lwm yam. Yooj yim rau txiav tuab ntoo hauv paus hauv qab lub laj kab. Dav siv nyob rau hauv tsheb tsim, shipbuilding, aviation, rooj tog, kho kom zoo nkauj, railway, machining, yeeb nkab txiav thiab lwm yam industries, siab precision, zoo nyhuv.