Zhongshan, alternately romanized via Cantonese as Jungsaan, is a prefecture-level city in the south of the Pearl River Delta in Guangdong province, China. As of the 2020 census, the whole city with 4,418,060 inhabitants is now part of the Guangzhou–Shenzhen conurbation with 65,565,622 inhabitants. The city-core subdistricts used to be called Shiqi or Shekki.