Formal:
* 希望你一切安好 (Xīwàng nǐ yīqiè ānhǎo): This is the most formal way to say it, literally meaning "Hope everything is good with you."
* 祝你一切顺利 (Zhù nǐ yīqiè shùnlì): This means "Wish you all the best" and can be used in formal settings.
Informal:
* 你好吗？ (Nǐ hǎo ma?): This is the most common way to greet someone and ask how they are.
* 最近怎么样？ (Zuìjìn zěnmeyàng?): This means "How have you been lately?" and is a more casual way to ask how someone is doing.
* 一切还好吗？ (Yīqiè hái hǎo ma?): This means "Is everything alright?" and is a more informal way to express concern.
You can also add "希望你..." (xīwàng nǐ...) to the beginning of any of these phrases to make it more explicit that you are expressing hope.
For example:
* 希望你一切安好 (Xīwàng nǐ yīqiè ānhǎo): Hope everything is good with you.
* 希望你最近怎么样？ (Xīwàng nǐ zuìjìn zěnmeyàng?): Hope you've been doing well lately.
The best option for you will depend on your relationship with the person you are speaking to and the context of the conversation.