I have been three times to China, but the first two were about 20 years ago. If there is one country that has changed beyond recognition in 20 years it is definitely China. New megacities have emerged from almost nothing. There are now skyscrapers over 4300 skyscrapers in China, about four times more than in the United States. Among those 115 of them exceed 300 metres in height - more than all the rest of the world combined! China now accounts for the two thirds of all highspeed railway tracks in the world and is planning to double that by 2035. In other words, about 80% of the world's highspeed trains will be in China in ten years or so.