What kind of fruit is this? Sweet and sour?

Red fruit (scientific name: European lilac. ) is a small evergreen tree of Myrtaceae, 5 meters high, hairless, flowering in spring, native to Brazil. I prefer humidity to cold and drought. This plant can be used as a potted ornamental tree species and can also be made into food.

gingkgo

Hongguozai

Another name

Brazilian red fruit, French cherry, Puhong fruit, American sycamore.