What does Long Mai mean, and the distribution of China and Long Mai in the world?

Feng Shui calls the undulating terrain (mainly continuous mountains, but not limited to mountains) Long Mai. In ancient times, "geomantic omen" was the first to promote "the strategy of five places", that is, dragon, cave, sand, water and direction. The corresponding activities are "dragon hunting, sand inspection, water viewing, acupoint pressing and standing still". Dragon is the geographical context, soil is the meat of dragon, stone is the bone of dragon, and vegetation is the hair of dragon. Looking for dragons, we must first find the mountains of ancestors and parents, judge the pulse, don't be angry, and divide yin and yang.

Long Mai of the Yellow Emperor is in the Yellow River Basin of the Central Plains; Long Mai of Dayu is in Jiulong Mountain, Wenchuan County, Sichuan Province today; Long Mai in Shang Tang is in the Yellow River Basin; Long Mai of the Zhou Dynasty was in Qishan; Long Mai of the Qin Dynasty was in Xianyang; Long Mai in Han Dynasty was in Pei County; Long Mai in the Western Jin Dynasty was in Hanoi; Long Mai of Sui Dynasty was in Hongnong; Long Mai in Tang Dynasty was in Chang 'an, Longxi and Taiyuan. Long Mai lived in Kaifeng, Gongyi and Luoyang in Song Dynasty. Long Mai in Yuan Dynasty was in Inner Mongolia grassland; Long Mai of the Ming Dynasty was in Fengyang, Anhui; Long Mai in Qing Dynasty was in the northeast. Of course, these are approximate ranges. In fact, it is difficult to determine the specific location of Long Mai, because the dragon's range of activities is changeable, and most Long Mai is born by mountains and rivers.