北京的地铁扩张增加了三条新线, 使中国最长为879公里。 Beijing's metro expansion adds three new lines, making it China's longest at 879 kilometers.

北京在12月15日扩大了地铁系统,增加了三条新线,总长度达879公里,是中国最长的。 Beijing expanded its metro system with three new lines on December 15, reaching a total length of 879 kilometers, the longest in China. 新的网络现在包括522个台站和98个交换点,东-西线连接现有的南北路线。 The new network now includes 522 stations and 98 interchange points, with an east-west line connecting to existing north-south routes. 这一扩展旨在缓解交通堵塞,以该市1969年开通的第一个铁路线为基础,加强了旅行选择和城市发展。 This expansion aims to ease traffic congestion and was built upon the city's first rail line opened in 1969, enhancing travel options and urban development.