Formal:
* 欢迎 (huānyíng): This is the most common and formal way to say "welcome" in Mandarin.
* 热烈欢迎 (rèliè huānyíng): This means "warm welcome" and is often used in formal settings.
Informal:
* 你好 (nǐ hǎo): This is a general greeting that can also mean "hello" or "good day." While it's not directly translating to "welcome," it's a common way to greet someone, especially in informal situations.
* 进来 (jìn lái): This literally means "come in" and can be used as a way to welcome someone into your home or a space.
It's also important to note that the pronunciation of "welcome" in Mandarin differs slightly depending on the context and the speaker's regional dialect.
So, depending on the situation, you can choose the best way to say "welcome" in Mandarin.