What does it mean when a guy says aww to a girl
Jul 24, 2019 · Informal vs Formal Use. 你 (ǐ) is the informal form of "you" and is used for greeting friends and associates. The formal "you" is 您 (nín). Thus, the formal form of "hello" is nín hǎo - 您好 . 您好 (nín hǎo) is used when speaking to superiors, people in authority, and elders.