Why are Japanese people so cold when they visit China, and even the airport doesn't even hang welcome signs?

It is mainly the psychological factors of the Japanese nation at work. In their eyes, China people are inferior races. No matter how powerful you are, they still look down on you in their hearts. Why is Japan so respectful to America? It is because, from18th century, the "Great White Fleet" led by General Perry of the US Navy to now, only Americans have defeated him. (In their eyes, our victory in War of Resistance against Japanese Aggression is also due to the help of the United States. So the Japanese only serve the strong. . To put it simply, if China hit the Japanese once, they wouldn't and wouldn't dare to do this to us.