Unfortunately our trip to Shanghai was very short, we were there for only 3 days taking advantage of the fact that we had some friends that lived there. Our final destination was actually Vietnam. To travel to China most people need a visa (Colombians, French, Americans , etc.) however you can do transit through the country for a total of 144 hours. So luckily we didn’t have to deal with that! But you do have to get a special permit upon arrival, showing you’re there for the less than the hours permitted.