The company obtained the People's Republic of China Drug GMP Certificate (Magnesium Sulfate, Magnesium Oxide) (2010 Edition) on May 13, 2019, with certificate number HE2019 0050; Obtained the People's Republic of China Drug GMP Certificate (Heavy Magnesium Carbonate) (2010 Edition) on February 2, 2016, with certificate number HE20160027