According to the data of the International Aluminum Association, the world's alumina production in May 2021 was 12.166 million tons. Compared with 11.714 million tons in April 2021, it increased by 3.86%. On a year-on-year basis, world alumina production increased by 8.57% from 11.206 million tons in May. In the first five months of this year, world alumina production totaled 58.158 million tons, up 6.07% from 54.829 million tons in the same period last year. Among them, China's alumina output in May was 6.51 million tons, up 3.33% from 6.3 million tons in April. The year-on-year growth rate was 10.90% from 5.87 million tons. From January to May this year, China's output was 31.16 million tons, up 9.49% from 28.46 million tons in the same period last year.