Lake Hongze is the fourth largest freshwaterlake in China. Lake Hongze has quadrupled in size since the 12th century. A particularly large changed happened in 1680 (the 19th year of the Kangxi era), when the Yellow River changed its course and merged with the Huai River. Heavy sediment from the Yellow River blocked the course of the Huai River and diverted water from the Huai, creating the Hongze Lake as we know it. The city of Sizhou was completely submerged, as was the nearby early-MingMing Ancestors Mausoleum. The latter was rediscovered only in the 1960s.
Hongze Lake is famous for its abundant natural resources and beautiful scenery, which have attracted tourists from all over the world. What's more, the crabs from the lake are so delicious that many people travel to Hogze Lake just for a taste. People living near the lake make the most of it by developing the tourism and fishing industry.