何以笙箫默忆昔醉红尘
[hé yĭ shēng xiāo mò yì xī zuì hóng chén]
'He Yi Sheng Xiao Mo Yi Xi Zui Hong Chen' refers to memories and reminiscence. It could come from a story or novel character who uses musical instruments like 'sheng' (a reed pipe) and 'xiao' (a vertical flute), remembering past pleasures and indulgence ('drunken in worldly affairs') in a nostalgic tone.