Yǐng shū Yān shuō name 郢書燕說

1. lit. Ying writes a letter and Yan reads it
2. fig. to misinterpret the original meaning
3. to pile up errors
4. refers to the letter from capital 郢[Ying3] of 楚[Chu3] in which the inadvertent words "hold up the candle" are mistaken by the minister of 燕[Yan1] as "promote the wise"