There are several ways to say "hello" in Chinese, depending on the context and the relationship between the speakers. Here are some examples:

• 你好 (nǐ hǎo): This is the most common way to say "hello" in Chinese. It is a formal greeting that can be used in most situations.

• 嗨 (hāi): This is another way to say "hello" in Chinese that is typically used when speaking to friends or people your own age.

• 嘿 (hēi): This is a casual way to say "hi" in Mandarin using the sound of the English "hi".

• 你们好 (nǐmen hǎo): This Chinese greeting is used to say "hello" to a group.

• 你好吗 (nǐ hǎo ma): This is a common way to ask "how are you?" in Chinese. It can be used in both formal and informal situations.

To hear the pronunciation of these greetings, you can watch videos on YouTube such as "How to say Hello in Chinese | Mandarin MadeEz by ChinesePod" or "Learn Basic Greetings in Mandarin Chinese: Hello, How Are You, Thank you 中文打招呼 LearnChineseWithEmma".