Our company, dong yang engineering ltd.,has been a manufacturing company. since 1985,producing electronic equipment for fishery and indication, that is radio buoy,light buoy, battery for radio buoy and light buoy, sea lights, sos lights(solar 1974)and rechargeable underwater lights etc.. reputation among the users has encourage us to expand our market to the world in these day, we are exporting our products to japan,Taiwan, Australia, USA etc.. we promise to make the good quality products. we got a certification of iso 9002 in 1999. and we assure that we will provide our best quality product with all of the world world