I was planning a flight from Lanzhou to Lhasa when I noticed something strange with the chart I was using:
If you couldn’t tell already, this chart uses kilometers per hour for speed restrictions and meters for altitude restrictions. This is very unusual because I thought that feet and knots were used universally around the world. Even more confusingly, while they change their speed restrictions to km/h, they still record distance using nautical miles. At first I just attributed this to China being China, but then when I was planning a flight to Ulaanbaatar, I noticed that Mongolia does the same thing! Why are these countries different?