伪装善变薄凉掩饰
[wĕi zhuāng shàn biàn bó liáng yăn shì]
Combining elements suggesting hypocrisy and defense mechanisms, 'Wei Zhuang Shan Bian Bo Liang Yan Shi' describes masking true emotions under various appearances or attitudes which frequently change ('shan bian'—volatile), showing indifference on purpose while hiding genuine sentiments inside. The person appears uncaring as a way of protection.