妲己再美终归是妖
[dá jĭ zài mĕi zhōng guī shì yāo]
Daji is an infamous character from ancient Chinese history/mythology; here 'Daji Zai Mei Zhong Gui Shi Yao', translates as 'No matter how beautiful Daji is, she is still a fox demon/woman'. This implies that no matter how attractive or charming a person appears on the surface, the true nature can be different - caution in being deceived by outward appearances.