Black jujube is an alias, and its official middle name is Junqianzi, a deciduous tree of persimmon tree. Because its fruit is light yellow when it is first ripe, it turns blue-black later, so it is named black jujube. Its aliases are soft dates, milk persimmons and so on. Mainly distributed in Liaoning, Hebei, Shanxi, Shaanxi, Gansu and some southern provinces. It is usually in barren hills, hillsides and bushes in valleys. In recent years, people usually sow seedlings as rootstocks for grafting persimmon trees.

Appearance characteristics of black dates: deciduous trees, up to 30 meters high, spherical crown, gray-black or gray-brown bark; Simple leaves alternate, and the leaves are oval; Calyx bell-shaped, quadrangular, corolla pot-shaped, quadrangular, reddish or yellowish, flowering in May and June; The fruit is round, small, one to two centimeters in diameter, just ripe and light yellow.

Then it turns blue-black, with a thin layer of ash on the surface, and the fruit ripens in 10.

The main uses of black dates are: first, they are often used as rootstocks for grafting persimmon trees; Second, fruits can be eaten or brewed, and persimmons can also be made; The fruit can be used as medicine to quench thirst and reduce fever.

Vitamin c can be extracted from fruits and young leaves; Wood is hard and wear-resistant, and can be used for weaving wooden shuttles, carvings, gadgets, etc.