Complex sentence: Li and Cai Yuanpei had been impressed with the rational organization of the French system of higher education in which, instead of random groupings, the country was divided into regional districts which did not overlap or duplicate each other's missions.
Split into simpler sentences: Li and Cai Yuanpei had been impressed with the rational organization of the French system of higher education. Instead of random groupings, the French divided the country into regional districts which did not overlap or duplicate each other's missions.