One day a Taoist priest came, and stepped forward to cure the empress 'illness. In order to not violate the taboo against touching the empress, the priest had the emperor tie a silken ribbon around her wrist.
一天來了一名道士，自願為皇后治病，為了男女避嫌，便要求皇上用絲線綁在皇后手脈上診斷．成祖有心試探，故意先將絲線分別系在玉環及貓足上，都為道士所解。