20/kloc-started school in September, and graduated in July, 2020. Senior high schools in China are all three-year programs, and they graduate in 2020, with the enrollment time of September 20 17 and the graduation time of July every year. Therefore, the educational experience of graduating from high school in 2020 is September 20 17 and graduation in July 2020. The educational experience begins in September 1 of the year of enrollment and ends in July 1 of the year of graduation. In a broad sense, educational experience begins with receiving formal national education, starting from primary school and ending with working in university.