(The source code of the subway route map applet is a subway route map including Beijing, Shanghai, Guangzhou, Zhengzhou, Shandong, Hangzhou and other nearly 50 cities across the country. Covers all the line maps of these cities, such as Metro Line 1 and Line 2, to help users understand and experience the city's traffic faster and more conveniently, and query users' subway line maps and subway station locations. 39;s current city at a glance.)