如今，任何人都不会忽视北京日新月异的发展速度，相继建成的三环路、四环路、五环路就如同震撼世界的巨大能量波一样，直观地标示出了这座城市的成长历程，而向北环行数十公里的轻轨铁路更是赋予了“北京城”这一概念无限的想象空间。不过，若俯瞰北京，你就会发现在北四环路 Nowadays, no one will ignore Beijing’s ever-changing pace of development. The Third Ring Road, the Fourth Ring Road and the Fifth Ring Road built in succession, just like the huge energy waves that shock the world, directly mark the growth course of the city. The LRT, which is tens of kilometers north of the ring, gives the concept of “Beijing City” an infinite imagination. However, overlooking Beijing, you will find the North Fourth Ring Road