have a previous engagement
The Chinese idiom pinyin is y ǒ uyu ē Z à IXI ā n, which means it has been agreed. It means that a plan has been made in advance. It's from raising eyebrows.
Idiom usage
To act as a predicate or attributive
The origin of Idioms
The first fold of Yuan Wu Ming Shi's "raising a case to raise eyebrows" says: "old lady, this matter has already been arranged in advance, Kuang Jian'er insists on marrying him, which is also his fate."
have a previous engagement
the writer 's sincerity shines through his words - qíng jiàn hū cí