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Qinzhou Bay is part of the port cities of the northern Gulf in the South China Sea, which is located in the southern part of Qinzhou city in the Guangxi Zhuang Autonomous Region. These great areas of water measure 400 square kilometers. Islands are scattered all inside the gulf like stars in the sky, with many the river-lake-estuary regions and the coast turns and twists, owing to the transgression of the late quaternary glacial period.
Among which Longmen port had the favorable conditions of building one natural year-round deep-water ice-free port. Maowei sea is located in the northern part of Europe, with the freshwater of Qin River and Maoling River discharging into the sea. There're plentiful of bait and fish resources. Aquaculture is also very developed. Four large famous native products of Qinzhou are the green crab, garoupa, langoustine and oyster.
There's mangrove forest with hundreds of hectares, with huge numbers of the birds and wild duck. One of the eight scenic sights of Qinzhou is known as 72 streams of Longmen which are formed by the winding channel among many islands. Tides of Qinzhou Bay are mainly diurnal tide. The average tidal range in Longmen region is 2.55 meters, with the largest tidal range of about 5.49 meters.
The tide of high tide flows in the northwestern direction, while the falling tide flows southeast. The average annual water temperature is about 21.3 degrees centigrade. Qinzhou Bay as well as the adjacent coastline belongs to the China's coastline open land. In order to make the environment and economic development progressing in coordination, the local government would make Beihai and many counties within Qinzhou city be regarded as the Qinzhou Bay region, which is situated in the front position facing Southeast Asian economic zone.
Qinzhou Bay region with its back against China's great southwestern region is the most convenient coastal channel for Guangxi and China's southwestern region leading to Africa, Europe and Southeast Asia to enter into the international commercial market. Since from the Han Dynasty, the "Silk Road" on the sea was open with Hepu and Xuwen as the starting points, which made the area along the Qinzhou Bay an important channel to the sea for foreign trade and exchanges in ancient China.
With superior position, good weather conditions and convenient transportation, the place is suitable for planting subtropical crops, with plentiful of forest and mineral resources. A wide stretch of beach with numerous tiny islets and the intricate coastal bay is the golden seacoast of developing foreign trade and tourism.
72 streams of Longmen are the comprehensive ecological tourist spot that had gathered together the cultural landscape and natural landscape merging into one organic whole. Known as the Penglai in southern land since the ancient times and now people called it as small Penghu that is comparable to Penhu Islands of China’s Taiwan Province.
Nearly 10,000 acres of mangrove forests that are growing in sheets and are reputed to be the living fossil under the sea are also found in 72 streams of Longmen. Green mangrove forest and crystal clear waters could add to each other's splendor, with extremely exquisite landscape.