Martial arts novels allude to another method for determining parentage--dripping the blood of two people into a bowl of water. If the blood blended together, this was taken to mean that the two had a familial relationship.
武俠小說中還有另一種「滴血認親」法──取來一碗水，將兩人的血滴入水中，如果血液融合在一起，就表示是一家人。