Idiom explanation:

Show: beautiful; Hui: Alliance. Beautiful appearance, smart heart.

Idiom origin:

Tang Hanyu's Preface to Sending Li Yuan to Pangu: "The eyebrows are bent and the cheeks are full, and the sound is clear and the body is convenient, which is beautiful."

Example:

Clear ~, make people love and forget to die. (Qing Pu Songling's Strange Tales from a Lonely Studio Yu Xiang)