r-cnmap

According to the code or the name of the administrative division at the county level and above provided by the Ministry of Civil Affairs of the People's Republic of China in 2022 (<https://www.mca.gov.cn/mzsj/xzqh/2022/202201xzqh.html>), get the map file online from the website of AutoNavi Map (<http://datav.aliyun.com/portal/school/atlas/area_selector>).