不哭不闹强颜欢笑
[bù kū bù nào qiáng yán huān xiào]
"No Crying, No Disturbance, Forced Laughter." This suggests a person who chooses to suppress their true feelings, especially pain or sorrow, while appearing cheerful outwardly. This kind of person does not want to trouble others with personal emotional turmoil and maintains a facade of happiness.