|simpl. and trad.|
During the Tang dynasty, the area of what is now Sichuan, was administratively divided into three regions based on the main throughfares through the mountains 川道 (chuāndào, “mountain pass (often near a river)”) at the time. During the Song dynasty, these regions were further re-sectioned into four separate regions, giving rise to its modern name: 四川 (literally: four mountain passes).
四川 (traditional and simplified, Pinyin Sìchuān)