“你”和“您”都是第二人称单数­的面称­用语。­“你”­是一般­的称谓­，用在­同辈或­比自己­辈分小­的人身­上，还­可以用­在较熟­悉的朋­友之间­的互称­；“您­”是用­在对长­辈或上­级的面­称，表­示尊敬­。
Both nǐ and nín are pronouns of “you”. The former is generally used with colleagues of one’s age, younger people, close friends or acquaintances. The latter is applied to elders or higher-ranking officers as a respectful form of addressing.
For example, Tom asked Peter: Will you go to the cinema?
汤姆问皮特：你会去看电影吗？
The secretary told her manager: You have a meeting at 4pm.
秘书告诉经理：您下午四点有会要开。
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