Eating longan in the evening is most suitable. Generally, eating fruit at night is not conducive to digestion. Fruit contains a lot of sugar, which easily leads to excess calories and obesity. In particular, eating fruits with high fiber content before going to bed will affect sleep, which is even more harmful to people with poor gastrointestinal function. If you don't sleep well, you can eat a few longan, which can soothe your nerves and help you sleep.