Formal:
* 您好吗? (Nín hǎo ma?) - This is the most formal and polite way to ask. It literally translates to "Are you well?"
* 您最近怎么样? (Nín zuìjìn zěnmeyàng?) - This is another formal way to ask and means "How have you been lately?"
Informal:
* 你好吗? (Nǐ hǎo ma?) - This is the most common and casual way to ask. It's the same as the formal version but without the "nín" which is the respectful term.
* 怎么样? (Zěnmeyàng?) - This is a very casual and informal way to ask, often used between friends or family. It literally means "How is it?"
Other options:
* 最近还好吗? (Zuìjìn hái hǎo ma?) - This means "How are you doing recently?"
* 身体怎么样? (Shēntǐ zěnmeyàng?) - This is a polite way to ask "How is your health?"
Remember to use the appropriate greeting depending on the context and your relationship with the person you are speaking to.