Oak seed

It is the fruit of an oak tree. Oak grows in Zhongtiaoshan area and is a deciduous tree. Its fruit is a round ball, the shell of the ball is called rubber shell, which can be used as dye, and the inner kernel is called rubber seed. Rubber seeds have high nutritional value, rich in starch, sugar, etc. They are high-quality livestock feed, which can also be eaten by people, and are often used to make paste in industry. Oak leaves can be used to raise tussah, and bark can be used as cork products and industrial dyes.
Reprinted with attribution： https://cnlocality.com/(Chinese Specialty Products)