Guangdong Fengkai Heishiding Provincial Nature Reserve is located in the south-central Fengkai County, Guangdong Province, and is known as the "oasis on the Tropic of Cancer" because of the Tropic of Cancer running through the central nature reserve. The reserve was approved in August 1979 and has a total area of 4,200 hectares. The main protection objects are tropical, subtropical evergreen broad-leaved forest and national secondary rare and endangered protected plant species such as black scorpion population, sealing and open anemone and other special species and habitats.