Where is the largest and highest national flag? Heihe

Heihe City, a prefecture-level city under the jurisdiction of Heilongjiang Province, formerly known as Aihui, is located at the eastern end of the Greater Xing'an Mountains and the northern part of the Lesser Xing'an Mountains. The mountains in the territory are undulating, belonging to the cold temperate continental monsoon climate, with a total area of 68,726 square kilometers. Heihe City has a long history. Archaeological evidence shows that as early as the Old Stone Age, humans were active here, forming the basis of the local ancient indigenous people. On February 8, 1993, Heihe was demoted to a city. With the centerline of the main channel of the Heilongjiang River as the boundary, it faces Blagoveshchensk, the third largest city in the Russian Far East and the capital of Amur State, across the Heilongjiang River. It is the only corresponding city on the Sino-Russian border with the largest scale, highest specifications, most functions, and closest distance, with the closest distance being only 750 meters. Heihe City is rich in cultural resources, and there are physical types such as the ruins of Aihui Ancient City, the ruins of the ancient city of the Jin Dynasty, the relics of the Sunwu War, the activity sites of historical figures, and the customs of ethnic minorities in the territory.