Which plains do Saishang Jiangnan and Saishang Miliangchuan refer to?

Shangjiangnan, originally named "Saibei Jiangnan", originally referred to the Hedong Irrigation Area of ??the Yellow River in northern Ningxia, which is the Yellow River Irrigation Area in Wuzhong City, Ningxia today. Today it generally refers to the Yellow River Plain in Ningxia, including Yinchuan City, Wuzhong City, Shizuishan City and Zhongwei City in northern Ningxia. Qin and Han canals have been built since ancient times, and the Yellow River water is used for irrigation. Agriculture and animal husbandry are developed, with many lakes, contiguous wetlands and beautiful scenery. , better than Jiangnan. There are national 5A tourist attractions Shahu and Shapotou Scenic Area represented by natural light, Shuidonggou, Xixia Tombs and Zhenbeibao Film and Television City represented by history and culture, as well as Helan Mountain, China Returning Home Cultural Park, Mingcui Lake, Yellow River Tower, Yellow River Altar and many other tourist attractions.

The Hetao Plain south of Yinshan Mountain has a flat terrain, fertile soil, and crisscrossing ditches. It is known as the "Blocked Rice River".

The Ningxia Plain and the Hetao Plain are famous irrigated agricultural areas in my country. Here, we take advantage of the natural slope of the Yellow River's slightly inclined direction to dig diversion canals to divert Yellow River water for gravity irrigation. Famous channels such as Qin Canal and Han Canal are still preserved in the Ningxia Plain. There are crisscrossing ditches on the plain, connected by bridges, densely covered rice fields, and looking out over the village houses. It is known as the "Fortress on the South of the Yangtze River". The Hetao Plain developed into the "Sai Shang Mi Liang River".