Kuroi, a write full legendary Millennium ancient town, as early as the Han Dynasty more salt, well salt rich in famous southwest around, to the Ming and Qing Dynasties two dynasties, Yunnan local tax six into above, is to rely on the collection of tax income. The last century thirty's, Heijing Town prosperity and wealth reached its peak, become rich but enemy Province, Tongda overseas "Yandu", and Yang in the so-called "Yandu" Heijing Town come first on the list no one can be the enemy.