Qinling mountains,across China in the middle of things toward the mountains.South west southern gansu,shaanxi to the west of hubei,henan,about 1500 kilometers long.For Yellow River tributary of the wei river and the Yangtze river tributary jialing river,han river watershed.- the huaihe river in qinling line is the most important Chinese geographical north-south border,qinling is revered as the dragon vein of Chinese civilization. Qinling mountains,across China in the middle of things toward the mountains.South west southern gansu,shaanxi to the west of hubei,henan,about 1500 kilometers long.For Yellow River tributary of the wei river and the Yangtze river tributary jialing river,han river watershed.- the huaihe river in qinling line is the most important Chinese geographical north-south border,qinling is revered as the dragon vein of Chinese civilization.