H剪个短发凉夏天W留个长发暖冬天
[h jiăn gè duăn fā liáng xià tiān w liú gè zhăng fā nuăn dōng tiān]
'Cut short hair to cool down for summer H, and leave long hair to warm up in winter W' which implies adapting to seasonal conditions, or changing styles or attitude as needed for varying circumstances.