It is true that persimmons cannot be eaten with seafood. Persimmon and seafood together will lead to abdominal pain, vomiting. This is because seafood is rich in protein, which combines with the ellagic acid in persimmons and solidifies into ellagitannin, which cannot be digested by the body.
"Every festive season is a time to think of one's relatives" is from the Tang Dynasty poet Wang Wei's "September 9 Memories of Shandong Brothers".