微微一笑很倾城
[wēi wēi yī xiào hĕn qīng chéng]
A phrase used in Chinese literature to praise the charm of a woman whose 'Slight smile can impress the whole city'. The character with this username has likely been influenced by traditional Chinese poetry and romance novels, and she is expressing confidence in her appeal and personality, which can bring positive impacts and win admiration or even amazement.