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geography
ask for directions and orientation
polite expressions
time
date
rì 日 = hào 号, so you can also say: èr líng èrwǔ nián sān yuè shíjiǔ hào 2025年3月19号 The question to ask date: Jīntiān shì jǐ yuè jǐ hào? Q: 今天是几月几号？ What date is today? (Today is which …