我姓黄却不能对你说谎
[wŏ xìng huáng què bù néng duì nĭ shuō huăng]
Meaning 'I am surnamed Huang but cannot lie to you', indicating that the net user is emphasizing their honesty toward someone despite the coincidence of sharing the same surname 'Huang' with a Chinese character homophonic word which refers to being yellow, deceitful or dirty. In this cultural background, the person insists on honesty.