Where is the dragon vein of the Qing Dynasty? Why didn’t the Ming Dynasty destroy it first?

On the banks of the Suzi River, at the foot of Qiyun Mountain, Yongling is the ancestral mausoleum of the Aixinjueluo clan of the Qing Emperor. It is the mausoleum of the father, grandfather, great-grandfather and other royal relatives of the Qing Taizu Nurhachi. People say that Shenyang is "the birthplace of one dynasty and the capital of two generations of emperors", and Yongling is the "ancestral tomb" of the Qing Dynasty royal family. Legend has it that in the late Ming Dynasty, when Emperor Chongzhen was in power, his Imperial Heavenly Supervisor was observing the sky at night and suddenly discovered that purple gas was coming from Liaodong, just like a hundred dragons soaring in the clouds and riding the mist. He was afraid that his throne would be usurped when Hunlong was born, so he hired a Feng Shui master from the south to go to the northeast to break 100 dragon veins. He led a group of people to the northeast, walked along the east ditch and crossed the west hillock. When he found the dragon's veins, he dug a large deep ditch around the dragon's neck, which meant cutting off the dragon's head, or pressing a small temple on the dragon's head to show restraint. Lived with dragon energy. In this way, they broke 99 dragon veins in a row. There is only one "hanging dragon" three feet above the ground. He thought, since it is a hanging dragon, if it is not attached to the ground, it cannot form dragon veins, and no one can bury it, so it cannot become a mixed dragon, even if it is not broken. So, he returned to Beijing to resume his duties.