When and who built the Great Wall in lingwu city, Ningxia?

Lingwu, the seat of Lingzhou in ancient times, has always been a strategic place for the Central Plains dynasty to station in the northwest border. For the need of military defense, the rulers of Qin, Han, Sui and Ming dynasties all built the Great Wall in Lingzhou, and stationed troops to guard and immigrate here. The Great Wall of Lingwu is the best preserved and most magnificent in Ming Dynasty. It rises from the bank of the Yellow River in the west, just like a dragon, drinking the water of the Yellow River, crossing the sand sea, crossing the hilly grassland and stretching eastward on the vast Ordos platform.

Lingwuming Great Wall runs through He Lin Town and ningdong town City from west to east, and Majiatan Town enters Yanchi County. Historically known as "Hedong Wall", it is also called "Dongda Edge" or "Hengcheng Edge".

The Great Wall of Lingwu Ming, built in A.D. 1474, starts from the bank of the Yellow River in the north of the city in the west and extends to the southeast. Passing through Shuidonggou, Hongshanbao, Qingshuiying Castle and other places, passing through Yanchi County to Zhoutaizi Township, Dingbian, Shaanxi Province. The total length is about 200 kilometers, and Lingwu is 45 kilometers long. According to historical records, Lingwu once built two Great Walls, one is the Sui Great Wall and the other is the Ming Great Wall, both of which were made of local materials and rammed with loess.

-Excerpt from Lingwuming Great Wall