Nansi Lake is the biggest freshwater lake in northern China, including four connected lakes, Weishan Lake, Zhaoyang Lake, Dushan Lake and Nanyang Lake.

• 南四湖是中国北方地区最大的淡水湖，由微山湖、昭阳湖、独山湖、南阳湖四个自然湖泊贯连而成。