A few polite words — 你好, 谢谢, 对不起, 请问 — change how you are received.
A few polite words go a long way in China.
If you worry about being rude without meaning to, the right opener fixes it:
Politeness is highly valued in China; adding “请问” before any question reads as respectful even with rough pronunciation.
Every case shows the diagnosis and the first step - free. The full step-by-step fix for this exact case, the decision tree, and the offline kit are $9.99.
When tone worries you, the kit gives the polite set with notes on when each fits.
The polite-phrase set with tone notes for each situation.
Which situation needs which phrase.
The whole phrase kit as a printable card.
If you are still unsure of tone:
Most travellers know about three of these before they fly. This one is often not one of them.