Specifically, Jingzhou in the Three Kingdoms period refers to an area centered on the governor's mansion of Jingzhou, including Hubei Province, Hunan Province, southern Henan Province and a part of Guangdong Province today. Xichuan refers to today's Sichuan Province, including Chengdu Plain and Western Sichuan Plateau. Hanzhong refers to Hanzhong City in Shaanxi Province today, which was an important area for the struggle between Shu and Wei during the Three Kingdoms period.
It should be noted that the specific geographical boundaries of the Three Kingdoms period are not exactly the same as modern administrative divisions, and historical place names often change. Therefore, when describing the geographical scope of the Three Kingdoms period, we need to understand it in combination with the actual situation at that time.