Set in the Longzhou County in the southwest Guangxi Zhuang Autonomous Region, Longgang Nature Reserve with an area of 8000 hectares conserves China's most perfectly preserved tropical karst ecosystems. Constructed in 1980, it is studded with hosts of karst pinnacles and mountain ridges. caves and subterranean rivers. These weird and wonderful rock formations heighten the scenic beauty of the area and at the same time provide a sound base for research into the formation and development of karst regions and tropical ecosystems.

The area's special soil base has given rise to an unusual biotic population, with over 1280 species of plants recorded. The hsienmu, China's rarest and most precious hardwood tree, grows there. Its timber is exceptionally tough and hardwearing. As an representation of the southeastern tropical rain forest plants, the tallest known " Heaven Pillar " tree (Guangxi parashorea) in China was discovered at the Reserve in 1977. it towers at 60 m.its trunk is 3m in diameter. Longgang Reserve is also the home of the famous ornamental plant"Gloden Flowerpot the camellia family.

Longgang also supports over 120 species of animals. One of the world's rarest animals, the white-headed langur, or leaf monkey, at the first level of protection in China, haunts the Reserve in a population of hundreds. It has stomach divided into partitions somewhat like that of cud—chewing animal, and feed more on leaves than on any thing else; it also has thin slender body, elongated limbs and a very long and whip—like tail; the head being rounded and the muzzle short and thick. Other animals at the Reserve under state protection include the rhesus monkey, clouded leopard. serow and hornbill.