他不是暖阳却温暖心脏她不是钻石却光芒万丈
[tā bù shì nuăn yáng què wēn nuăn xīn zàng tā bù shì zuàn shí què guāng máng wàn zhàng]
Translated, it's 'He is not sunshine but warms the heart; she is not diamond yet shines immensely bright,' signifying that although they don’t have apparent qualities, they still positively impact people deeply and brilliantly.