I come from Sichuan. When I was a child, there was a wild fruit called sweet potato in Sichuan. The scientific names seem to be Dipipa and Diguoer. Can you buy it in Beijing? price
Diqing, Dixiang, Diloquat, Sweet potato vine, Dijia purple, Dipomegranate. Is this it? It is delicious. Sour and sweet, not in fruit shops, but in Chinese medicine shops. The middle bud can also cure diarrhea. When I was a child, I went to the countryside to find wild melons to eat in the summer vacation.