"If H4 is valid, can one use H4 to travel overseas and return to US without Advanced Parole. I know H-1 is OK, but not H4."
You need to apply for a new H-4 visa by US Embassy in China. But as loon as the H-1 is valid, new H-4 visa should be no problem.
You need to apply for a new H-4 visa by US Embassy in China. But as loon as the H-1 is valid, new H-4 visa should be no problem.