Beijing plans to invest a billion yuan to maintain and renovate over 100 historical heritage sites. 6 of them are on UNESCO’s world heritage list. Beijing, 3000 years of history, and one of the world’s highest concentrations of world cultural heritages.
But years of economic development have resulted in the destruction of ancient city walls, siheyuan courtyard houses, and other architectures. Yongdingmen, an ancient gate in south Beijing, was demolished and then rebuilt.