Liu Bowen beheaded Long Mai.

That's just a legend, there is no official record, even if there is such a thing, there is no scientific basis ... as follows: from Andingmen to the south, across the railway, all the way up is Fulongping. Fulongping is located in the third terrace of the Yellow River at the western foot of Gaolan Mountain. The general terrain inclines from south to north, just like a dragon. However, this is a "curled up" dragon. Legend has it that in the early Ming Dynasty, there was a man in Yuzhong who could pinch and calculate. Before he died, he told his son, "After I die, I will hang an arrow on my grave, and on 100, I will shoot it forcefully to the north." As a result, on the 99th day when her son was in front of his father's grave, the daughter-in-law couldn't bear it any longer, so she advised her husband, "One day, let's shoot the arrow." The son shot the arrow to the north according to his father's instructions. It is said that after this arrow was shot, Zhu Yuanzhang, the Ming emperor, was resting in the dragon chair when he suddenly felt a shock in his right hand and called Liu Bowen to visit him. Liu Bowen found a star especially bright in the north, saying that there might be an emperor in the north. Hearing the news, Zhu Yuanzhang sent Liu Bowen to the north to behead Long Mai. As soon as Liu Bowen arrived in Lanzhou, he cut the dragon into four sections. For fear of its "resurrection", he nailed four "nails" on it, which is the huge mound we can still see on Fulongping today, so Fulongping is also called Sidunping. Some people say, if you don't believe me, look at the roots of Hongshan and the soil of Hongnigou in Lanzhou, all of which are red with dragon blood. Various legends about "Long Fu" have different versions, but the content is roughly the same.