How Chongqing charted courses through hilly terrain

[@modoumbacke5683]

Nice report. Well done Megan

[@anamanjum4852]

Wow beyond imagination.....

[@emsik185]

this is very interesting nicely done video, thanks :)

[@andrea1995ri]

Nice video Megan!

[@meganjzhang]

Thanks so much Andrea :)

[@thomas4315]

You got to show what hill or mountain the escalator climb from the out side or it no different than the one at the mall and the same speed we have

[@Martun37]

why such a small amount of views???