【正】Since the Fushun Aluminum Plant invested in its magnesium branch and produced the magn e- sium by electrolysis for the first time in 1957, magnesium industry in China has been devel- oped for 50 years(1957-2007).During the 5 decades,the industry has experienced hardship and stagnation.For the past 10 years,the in- dustry has achieved rapid growth with enor- mous accomplishment.China has become a big manufacturer in primary magnesium in the world.