请多指教。

You usually say this right after introducing yourself. It often follows 初次见面 (Nice to meet you). You can say it to a new boss or a new teammate. It works perfectly when you join a hobby group or a class. Just bow slightly or nod while saying it for extra points. It makes you look like a pro at Chinese etiquette.

Use it whenever you are the 'newbie' in a situation. It is perfect for your first day at a Chinese company. Use it when meeting your partner's parents for the first time. It is great for starting a mentorship or a long-term project. Even in a casual setting, it shows you have great manners. It turns a cold introduction into a warm, respectful connection.

Do not use it with your best friends or siblings. It will sound like you are joking or being sarcastic. Avoid using it with people younger than you in a casual setting. It might make them feel awkward or pressured. Do not use it if you are actually the expert in the room. That might come off as 'fake humble,' which is a bit annoying. Stick to situations where there is a clear learning curve.

This phrase is deeply rooted in Confucian values of humility and hierarchy. In Chinese culture, showing modesty is a sign of high character. It is similar to the Japanese 'Yoroshiku Onegaishimasu.' It reflects the idea that we are all constantly improving through others. By asking for 'instruction,' you are actually giving the other person 'face.' It is a win-win for social harmony.

You can add 以后 (from now on) at the start: 以后请多指教. This makes it feel more like a long-term commitment. In very formal letters, you might see 恳请指教. On social media, people sometimes use it ironically when posting a new skill. For example, posting a photo of a burnt cake with this caption. It shows you know you have a lot to learn!