Nanchang (Chinese: 南昌; pinyin: Nánchāng) is the capital of Jiangxi Province in southeastern China, located in the north-central portion of the province. It is bounded on the west by the Jiuling Mountains, and on the east by Poyang Lake. Because of its central location relative to the Yangtze and Pearl River Delta regions, it is a major railroad hub in Southern China. Its population was 5,042,566 whom 4,171,926 in the built-up area made up of six urban districts plus the urbanized counties of Nanchang and Xinjian. As the Bayi Riot 1927 was distinctively recognized by the ruling Communist Party as "firing the first gunshot against the evil Republic of China", the current communist regime has therefore named the city since 1949 "the City of Heroes", "the place where the People's Liberation Army was born", and the most widely known "place where the military banner of the People's Liberation Army was first raised".