China exported about 64,312 tonnes of lysine salts and esters in December, down 1,556 tonnes or 2.36% from November but up 3,116 tonnes or 5.09% from Dec 2019; Jan-Dec exports totaled about 782,325 tonnes, up 195,424 tonnes or 33.30% compared to the corresponding period last year, according to data by China's General Administration of Customs.