Both the dairy trade and Sanlu were affected by the 2008 Chinese milk scandal. The chairman and general manager of Sanlu, and several party officials, including the vice-mayor in charge of food and agriculture, Zhang Fawang, were reportedly removed from office. Mayor Ji Chuntang reportedly resigned on 17 September. Shijiazhuang is a transportation hub at the intersection point of the Beijing–Guangzhou, Taiyuan–Dezhou, and Shuozhou–Huanghua railroads. The new Shijiazhuang railway station (opened December 2012) has a rare distinction of being served by both the "conventional"  Beijing–Guangzhou Railway and the new Beijing–Guangzhou–Shenzhen–Hong Kong High-Speed Railway. Such an arrangement is fairly uncommon on China's high-speed rail network, as typically high-speed lines are constructed to bypass city cores, where the older "conventional" train stations are. In Shijiazhuang's case, to make it possible to bring the new high-speed railway into the central city, a long railway tunnel was constructed under the city. This is the first time a high-speed railway has been run "under" a Chinese city. There is also a smaller Shijiazhuang North Railway Station, used by trains going west toward Taiyuan without entering Shijiazhuang's city centre. The city is served by many expressways, including the Shitai, Beijing–Shenzhen and Taiyuan–Cangzhou Expressways. Line 1 and Line 3 of the Shijiazhuang Metro began operation on June 26, 2017. Line 1 Phase 2, Line 2 Phase 1, Line 3 Phase 2 and the remaining two ends of Line 3 Phase 1 are currently under construction. Line 1 Phase 2, Line 2 Phase 1, and the two ends of Line 3 Phase 1 will start operation in 2020. There will be three metro lines extending under operation in Shijiazhuang by 2021 when Line 3 Phase 2 completes. The latest metro plan of Shijiazhuang includes 6 lines in total. The railway company is drafting a new plan of urban rail transit system incorporating metro, urban rapid commuter rail and tramways, and expects there will be rail transit lines under operation or construction by the end of 13th Five Year Plan (2020). The Shijiazhuang Zhengding International Airport is the province's center of air transportation. It is about 30 kilometers northeast of the city. There are 32 domestic routes arriving at and departing from Shijiazhuang, including destinations such as Shanghai, Shenzhen and Dalian.