How to understand that drinking and singing should be calm?

Keep a calm and optimistic attitude in a difficult situation.

"Have a drink, sing calmly and calmly" comes from Xin Qiji's poem "Cut a plum in the Mid-Autumn Festival in January". This poem ends with a scene, and expresses a leisurely mood by describing the red candle in the painting hall and the poet's leisurely toasting and singing. It can also be understood as keeping a calm and optimistic attitude in difficulties and seeking comfort through narcissism when you are lonely.