Can litchi be eaten with grapefruit?

Litchi-like food:

Litchi and cucumber are mutually gram. Litchi is rich in vitamin C, and cucumber contains vitamin C decomposing enzyme. If eaten at the same time, the vitamin C in litchi will be destroyed and lose its original nutritional value.

Litchi-carrot phase grams. Carrots contain an ascorbic acid enzyme, which will destroy vitamin C in litchi and reduce its original nutritional value.

Litchi-animal liver phase grams. Animal liver is rich in copper and iron plasma, which can oxidize vitamin C in litchi and reduce their nutritional value.