Shenzhen, also known as Sham Chun, is a major sub-provincial city and one of the special economic zones of China. The city is located on the east bank of the Pearl River estuary on the central coast of southern province of Guangdong, bordering Hong Kong to the south, Dongguan to the north, and Huizhou to the northeast. With a population of 17.56 million as of 2020, Shenzhen is the sixth most populous city proper in China. Shenzhen is a global center in technology, research, manufacturing, finance, and transportation, and the Port of Shenzhen is the world's fourth busiest container port.

Shenzhen roughly follows the administrative boundaries of Bao'an County, which was established since imperial times. The southern portion of Bao'an County was seized by the British after the Opium Wars and became Hong Kong, while the village of Shenzhen was situated on the border.