人潮拥挤人心可畏
[rén cháo yōng jĭ rén xīn kĕ wèi]
This username 'In Crowded Places, People's Hearts Can Be Scary' describes the feeling of being wary or intimidated by people in crowded places. It reflects that while it is bustling and lively around, one may also be afraid that complex and unknown human hearts will bring unpredictable harm or troubles. A kind of vigilance and loneliness from deep within.