Chen Yu Luo Yan (沉鱼落雁) is a famous Chinese idiom.
- 沉鱼落雁 (chén yú luò yàn): Makes the fish sink and wild geese fall
The idiom describes the magical beauty of women.
In particular, the idiom is related to Xi Shi (西施), and Wang Zhaojun (王昭君), two of The Four Beauties of ancient China (四大美女).
Chen Yu (沉鱼) refers to the beauty of Xi Shi, and Luo Yan (落雁) refers to the beauty of Wang Zhaojun.
The literal meaning of the idiom: A fish will forget swimming (and hence sink) while looking at the beauty of Xi Shi; the geese will forget flying (and hence fall down to the ground) while looking at the beauty of Wang Zhaojun.