According to the picture you provided, this fruit may be wood milk fruit or annona.

1. Muguo: It is a small semi-deciduous perennial arbor plant. Its fruit size is similar to pomegranate, and its juice is delicious, sweet and sour, which can quench thirst, relieve summer heat and reduce fever.

2. Annona: Also known as Ling Lin, Buluotuo, Yangpolo, Fanbaoluo, Sakyamuni, Pangui Litchi and Fotou Fruit, it is a tropical fruit, similar in size to pomegranate, dense and sweet in taste, and is listed as one of the famous tropical fruits with its unique fragrance.

Please note that more information or professional appraisal may be needed to determine the specific variety.