Ziziphus jujuba

The shape is smaller and rounder than common dates, the skin is purple, smooth and wrinkle-free, and it tastes sour, which can be eaten raw and used medicinally. Jujube kernel has many functions, such as strengthening the heart, nourishing the liver, calming the nerves and strengthening the brain.
Reprinted with attribution： https://cnlocality.com/(Chinese Specialty Products)