Longan Still Fruiting

After 4 months since the first flowers were seen on my langan tree many more fruits are still in the size of a ~1 cm in diameter. Although we have tested the 4 fruits last week, the rest just seem to be too long to wait. The rippened fruits were big (as last year's) and sweet. The arome was fantastic! Unfortunately the tree can't produce too many fruit. I guess it is because the tree is still young. There are more fruit to come but the quantity is almost the same as last year.