我用微笑控制溢出眼角的泪
[wŏ yòng wēi xiào kòng zhì yì chū yăn jiăo de lèi]
'Wo Yong Wei Xiao Kong Zhi Yi Chu Yan Jiao De Lei' means 'I use a smile to control tears spilling from the corner of my eyes'. It illustrates forcing happiness when feeling emotionally overwhelmed by sadness.