Students view a fighter plane at the retired weaponry exhibition area at the national defence education square in Harbin Huade University in Harbin, northeast China's Heilongjiang Province, Oct. 24, 2020. The construction of the national defence education square of the university completed on Saturday. (Photo by Zhang Tao/Xinhua)

Aerial photo taken on Oct. 24, 2020 shows students viewing a fighter plane at the retired weaponry exhibition area at the national defence education square in Harbin Huade University in Harbin, northeast China's Heilongjiang Province. The construction of the national defence education square of the university completed on Saturday. (Photo by Zhang Tao/Xinhua)

Aerial photo taken on Oct. 24, 2020 shows the retired weaponry exhibition area at the national defence education square in Harbin Huade University in Harbin, northeast China's Heilongjiang Province. The construction of the national defence education square of the university completed on Saturday. (Photo by Zhang Tao/Xinhua)

Aerial photo taken on Oct. 24, 2020 shows students viewing a fighter plane at the retired weaponry exhibition area at the national defence education square in Harbin Huade University in Harbin, northeast China's Heilongjiang Province. The construction of the national defence education square of the university completed on Saturday. (Photo by Zhang Tao/Xinhua)

Aerial photo taken on Oct. 24, 2020 shows the retired weaponry exhibition area at the national defence education square in Harbin Huade University in Harbin, northeast China's Heilongjiang Province. The construction of the national defence education square of the university completed on Saturday. (Photo by Zhang Tao/Xinhua)