The 100-year metre-track Yunnan-Vietnam Railway, through which France opened the southwest portal of China through Vietnamese colonies, objectively promoted the development of transportation in southwest China. The film "Ask No Question about West East" is part of Rimon's Bisezhai Railway Station, one of the earliest railway stations in modern Chinese history. The French station building, the round clock, still preserves the traces of history. Compared with last month's crowded Shaanxi History Museum in Xi'an, there are few people here. It's the most comfortable way to travel while walking quietly and watching.