"How have you been lately?" is a common way to ask someone about their recent well-being in Engpsh.
Here are a few examples:
"Hey, how have you been lately?"
"It's been a while since we last spoke, how have you been?"
"Just wanted to check in and see how you've been doing lately."
And the Chinese translations:
"嗨，最近怎么样？"
"我们好久没说话了，最近怎么样？"
"我只是想问一下，最近还好吗？"