热闹 rènao bustling

bustling; lively; busy

How to remember 热闹: 热 hot + 闹 noisy = bustling.

Characters

Describes a place full of noise, crowds, and activity in a positive way - 这条街很热闹 (zhè tiáo jiē hěn rènao) this street is bustling/lively.
Can also be a verb-like expression 凑热闹 (còu rènao) to join in the fun/crowd, or 看热闹 to watch the excitement as a bystander.
Different from 忙 (busy, task-focused) - 热闹 is about atmosphere and crowd energy, not workload.
Very common for describing festivals, markets, and family gatherings - 过年的时候很热闹 (guònián de shíhou hěn rènao) it's lively during New Year.