别笑了眼泪都掉了别哭了嘴角都笑了
[bié xiào le yăn lèi dōu diào le bié kū le zuĭ jiăo dōu xiào le]
Stop Laughing with Tears Rolling Down Stop Crying with The Corner of Mouth Laughing Up: It represents extreme emotions where one can be both happy and sad at the same time, expressing complicated feelings in life like laughter in sorrow and joy in tears.