阳光暖人不暖心
[yáng guāng nuăn rén bù nuăn xīn]
'Yangguang Nuan Ren Bu Nuansxin' translates to 'The sunshine warms but doesn't warm the heart'. This metaphorically means although appearances may give an impression of warmth or comfort (as sunshine usually gives warmth to people), it cannot truly warm someone’s heart. Thus this reflects someone who appears happy or cheerful on the surface but still feels lonely inside.