I am Ran. I was born in Jinan City, Shandong Province, China. I have been interested in mathematics since I was a child. I like thinking, playing cards, playing Chinese chess and some puzzle games. In 2008, I was recommended to the mathematics pilot class of the school of Mathematical Sciences of Nankai University through the mathematics competition, and I got my bachelor's degree in Mathematics in 2012. From 2012 to 2017, I studied nonlinear optimization under the guidance of my sup...