Currently, Chongqing built many underground railway, there are many underground subway, as established in the ground, so reducing the city's footprint also reduces noise, and this is one of the famous reasons
At present, Chongqing has built many underground railways, and there are many underground subways, because it is built underground, so the area of the city is reduced and noise reduced, which is one of the reasons why famous
At present, Chongqing has built many underground railways and many underground subways. Because they are built underground, they reduce the area of the city and reduce the noise, which is one of the famous reasons