Help!!! -> H4 visiting China without H1

Hi All,

I'm working in US on H1B and my kids are H4 holders dependent on me. Our I-485 apps have been pending for almost 1 year. I'm planning to send kids to China for one month vacation. My question is: Is there any issue for H4 to re-enter (they have APs) United States if I'm NOT with them?

Your same/similar experience or comment is greatly appreciated.

Have a good summer!