What is the specialty of zhenping county, Nanyang City?

Zhenping county's three treasures, jade, sesame oil, Yang Guangzao and jade, began to be cleared in the late Ming Dynasty and reached its peak in the 1990s. Sesame oil was produced in Zhang Lin Township of this county, commonly known as "Marin Oil", and was exported overseas before liberation. At that time, the oil seller put a brick in the oil basket, which was regarded as a trademark by foreigners, so it was called "brick brand oil" Crisp and sweet, when the fruit is ripe, you can hear the sound of stones shaking in your hand, so it is called "Yang Guang Yuan Ling". This kind of jujube tree can't be introduced to other areas, and it will taste bad when it leaves the local area, so it is particularly precious.