Recently, two airline of American issue the announcement that will cancel course of a China each at October suddenly, caused a variety of guessing. The view that somebody thinks these two course are profitless is an excuse only, because before paragraph time United States rejects to correct concerned Taiwan to indicate problem China gives out punishment to warn, this is method of a kind of retaliation likely. Also the course that somebody thinks the United States is in China is replaced by the plane of Chinese mainland, go down for a long time profitless.