紂王雖昏終是君妲己雖美終是妃
[zhòu wáng suī hūn zhōng shì jūn dá jĭ suī mĕi zhōng shì fēi]
These characters reference a tale from ancient Chinese history/mythology. It translates roughly as 'Despite Emperor Zhou being foolish he remains the King, despite Daji being beautiful she still remains his consort.' This can signify a theme of power and loyalty, even under negative circumstances.