想你系我的天性爱你系我的本性
[xiăng nĭ xì wŏ de tiān xìng ài nĭ xì wŏ de bĕn xìng]
This means 'Missing you is a natural reaction, and loving you is in my nature.' It suggests intense love towards someone. This nickname conveys deep emotion and shows that feelings are natural reactions rather than intentional actions.