时光乱了流年老了少年
[shí guāng luàn le liú nián lăo le shăo nián]
'Time makes everything messy, age grows old in time' indicates the passage of time, changes brought about by growth. Time is always moving forward, with everything gradually aging and changing. Some sayings like these often carry philosophical meanings. Here this idiom suggests an appreciation of the passage of time and memories left behind.