30 years old. Dongguan is a prefecture-level city under the jurisdiction of Guangdong Province and a megacity. Dongguan is located in the south of China, south-central Guangdong Province, on the east bank of the Pearl River Estuary, with Guangzhou in the northwest, Shenzhen in the south and Huizhou in the northeast. Xiao Chen is a 30-year-old worker. The land area of the city is 2460. 1 km2, and the sea area is 82.57 km2.