回复:Thanks. His renew
If his h1b renewal is approved before his entry to US, he has to reapply h1b renewal. In this case, the I-94 issued by CBP inspector will override (or invalidate) his h1b extension approval notice.
If his h1b renewal is approved after his entry, then he's fine.
If his h1b renewal is approved after his entry, then he's fine.