ㄏㄨㄢˋㄊㄧㄝˇhuàntiě

换帖
  1. 舊時朋友結拜兄弟交換姓名年齡籍貫家世柬帖結拜兄弟

  2. 訂婚男女雙方交換庚帖

to exchange cards containing personal details (when taking an oath of fraternity)​