On the western border of Canada and the United States, there is a famous transnational park, the Peace Gate Park, which was built in 1921. The park is divided into north and south by the national boundary, the northern part of Canada and the southern part of the United States. On the border line in the park, there is a white, solemn and tall "peace gate", which is the most dazzling landscape of the park. The Canadian flag and the American flag are inserted at both ends of the door. The two sides of the door are engraved with profound English words. The Canadian side is: BRETHREN.DWELLING.TOCETHER.IN.UNITY "peaceful living together", the United States side is: CHILDREN.OF.A.COMMON.MOTHER "One mother and two children". Hepingmen Park belongs to both countries. Tourists from both countries can visit, play, take pictures, relax and barbecue in the park without any restrictions. There are no police patrols in both countries, and no staff are on duty. Peace Gate Park is a symbol and witness of peace and friendship, brotherhood and brotherhood between the United States and Canada. It shows the world that if all countries are as friendly as the United States and Canada, the world will not have war.