Low grade. According to Chongqing Dibao, Liangping District of Chongqing is the lowest grade district in Chongqing because of its remote location, inconvenient transportation, poor air and poor development. Chongqing, also known as "Mountain City" and "Jiangcheng City", is a municipality directly under the Central Government of the People's Republic of China, a national central city, a megacity and an important national central city approved by the State Council.