Historically, Shunde is a place with a criss-cross river network and rich characteristics of water towns. As early as the early Ming Dynasty, due to the low terrain of Shunde and Nanhai, farmers dug low-lying land into ponds according to local conditions and piled soil around them to form foundations. Pond culture, planting fruits on the base, forming a so-called "fruit fish pond"; Some planted mulberries on the base and became "Mulberry Fish Ponds". By the beginning of the Qing Dynasty, the upsurge of "abandoning rice and mulberry" and "abandoning fields to build ponds" had arisen in Shunde and Nanhai. By the mid-Qing Dynasty, a specialized sericulture area and a mulberry fish pond area centered on Longshan, Longjiang and Jiujiang in Shunde had been formed. It can be said that Sangji Fish Pond is based on Shunde and Nanhai.
"Mulberry" (dike shape) and "fish pond" are produced in parallel, which promote each other and form a unity. Mulberry produces a large number of mulberry leaves through photosynthesis, which is used to raise silkworms. Mulberry litter and silkworm excrement (that is, silkworm excrement) fall into fish ponds, and are used by fish after microbial decomposition and fish feeding. Fish excreta and other residual organic matter and sludge can be decomposed and returned to mulberry base as fertilizer. So as to complete an ideal cycle process.
This is a virtuous circle and conforms to the law of ecological development. In this artificial ecosystem, mulberry is the "locomotive" of this system. Mulberry is strong, silkworm is strong, fish is fat, fish is fat, mud is good, and mulberry is strong, which makes the environment and biology, and biology and biology reach a relatively stable balance.
Today, Shunde still preserves the excellent ecology of Lingnan water town, but with the development of the region and the continuous improvement of agricultural level and high-quality aquaculture technology, Sangji fish pond has gradually withdrawn from the local historical stage.