China has a really long and great history when it comes to engineering and also conisdering China's size and geography mgeaprojects specially in Transport are needed and they are also happening. Chinese also have developed quality breaking the previous stereotypes of Chinese stuff being cheap and low quality.
An example from Sri Lanka on Chinese quality is in Sri Lankan Railway Chinese made DMUs have shown to be far superior to Indian made DMUs in Quality and the Indian DMUs are known for frequent breakdowns and Railway staff are even protesting against buying more of those
Buy more from China please !