Hmmm.. It is very cheap indeed. But I am wandering still how many people travel by air in Vietnam or can they afford it? If you check the world's busiest airports, Beijing capital airport ranked second with 83,650,000 passengers. I would like to know what is the figure for Vietnam. Also there are 3 Chinese airlines among the largest airlines by fleet size only behind these American ones. We are the world's second largest airline market. What I want to say is that we have all different means to travel, and all these sectors are massive, such as regular railway, and high speed railway, etc. Not to mention our 104,000 km expressway network, which has replaced the U.S. as the longest in the world. You can choose these means according to your budget, just like everyone else do. If you want to ask me can we afford the HSR, I can tell you this is the way to think: just compare the average income between China and Vietnam, then the answer is if you can afford regular trains then we can afford high speed trains. If you think we can't then it means people in your country can travel by bullock cart only. So do you admit this is the case?