人过招笑藏刀
[rén guò zhāo xiào zàng dāo]
The name '人在招笑藏刀' roughly translates to 'A Smile Conceals a Hidden Dagger.' This internet username evokes the idea of someone appearing friendly and laughing while concealing malice or harmful intent, similar to the concept in English, 'keeping your friends close and your enemies closer.'