Hanjiang River is located in the central coastal area of Fujian, with the latitude of 2523' ~ 2527' north and the longitude of11904' ~1910' east. Located in the branch of Daiyun Mountain and extending to the southeast coast, the residual vein of Nangshan Mountain is surrounded by flat terrain and fertile land, with a total area of 752 square kilometers, except for hilly red soil in the northwest and northeast. The highest elevation of the platform in China is less than 45 meters, and the slopes are all below 10. The coastline of Hanjiang River stretches 15km, and the shallow sea is wide, and the tidal flat area for aquaculture reaches 10000 mu. In the "20-mile flat field", rivers and ditches crisscross and ships shuttle.

Hanjiang River is a typical tropical maritime climate in South Asia. The monsoon here is obvious, warm in winter and cool in summer, with pleasant climate, abundant sunshine and rainfall. The annual average temperature is 20.2, the annual average sunshine 1943 hours and the annual average rainfall 1289 mm.

Hanjiang River is a part of Mulan River Plain in Putian. Fertile land, rich products, rich in rice, wheat, sweet potatoes, soybeans, peanuts and vegetables. There are four famous fruits such as litchi, longan, loquat and persimmon, as well as cuttlefish, oyster, clam, jumping fish, octopus and other seafood, especially eel and prawn, which are well-known at home and abroad. The area is rich in nonmetallic minerals. Geothermal water has a temperature of 30 ~ 60, which has great utilization potential. Brick and tile clay reserves are over 654.38 billion tons, and granite reserves are as high as 654.38 billion cubic meters. Building sand and mineral water are being developed and utilized. Nature endows the Hanjiang River with rich products.