强颜欢笑掩饰伤痕
[qiáng yán huān xiào yăn shì shāng hén]
'Forced Laughter to Conceal Wounds' reflects an effort to appear happy while actually hurting. This nickname signifies that the person tries to mask pain and sadness behind a facade of positivity to protect others from being concerned, or even just to preserve self-respect.