I. Subway route map
As of December 2021, a total of 11 lines of Nanjing Metro had been open to traffic with 191 stations and a total mileage of 427.1 kilometers. Nanjing is the first city in China with metro lines open to traffic in all districts and counties, and the third in China with cross-city metro lines launched only after Shanghai and Guangzhou.
Nanjing Metro Route Map:
https://www.njmetro.com.cn/njdtweb/home/go-operate-center.do?tag=czjj
As of June 2021, there have been two operating lines of Changzhou Metro, namely Changzhou Metro Line 1 and Changzhou Metro Line 2, with a total mileage of about 54 kilometers and 43 stations.
Changzhou Metro Route Map:
http://www.czmetro.net.cn/Html/convenience_siteSearch2.html?id=2
II. Introduction to Nanjing and Changzhou
Introduction to Nanjing
http://english.nanjing.gov.cn/
http://wb.nanjing.gov.cn/english_67934/
Introduction to Changzhou