让一让。

You use this when your path is blocked. You don't need a long speech. Just say it clearly as you move forward. If you want to be extra polite, add 请 at the start. You can also repeat it like 让一让，让一让 to sound more urgent. It’s like a verbal polite nudge for people's ears.

Use it anywhere people gather and block the flow. Think of a packed subway car at 8 AM. Use it at a busy street market while carrying bags. It works great at concerts or when leaving a crowded elevator. Even at a dinner table, you might say it to reach for the soy sauce. It is the ultimate 'crowd-clearing' tool for busy cities.

Don't use it to get someone's attention for a question. For that, use 不好意思 or 请问. If you are in a very formal ceremony, it might feel too casual. Avoid shouting it at elders unless it's a safety issue. Don't use it if you aren't actually trying to move past. It’s not a general 'hello'—it’s a functional request for space.

Chinese cities are famous for being incredibly crowded and lively. In these high-density environments, personal space is managed differently. 让一让 is a social lubricant that keeps the human traffic flowing smoothly. It reflects a culture that values efficiency in public spaces. It’s a small verbal contract that keeps everyone moving without hard feelings. It shows you are aware of others while still reaching your destination.

You will often hear 请让一下. This is slightly more formal and very polite. Some people just say 过一下, which means 'passing through.' In the south, you might hear more 'please' particles added. If someone is really in the way, you might hear 借过, which literally means 'borrowing a passage.' All of these are cousins to your main phrase.