It is the wrinkled papaya. When mature, the wrinkled papaya is also very hard and has a refreshing fragrance. However, this kind of wrinkled papaya can be eaten. When mature, peel and cut into long strips, canned, or blanched in boiling water. After a while, mix it with sugar and it will be sour and refreshing.
Wrinkled papaya is also a Chinese medicinal material and can also be made into preserved fruit, fruit wine, drinks, cans, etc.
Our Shandong Chenfeng Garden has a thousand acres of wrinkled papaya orchard, which has been planted for decades.