How much time is required between an international and domestic flight in Beijing airport

I’m travelling China on August. I’m arriving BJ airport at 5:22 in the morning and I´d like to take a flight to Guilin at 8:40 the same day, so I have 3 hours between the landing and the take off to pass the passport control and changing terminal of BJ airport. Is it enough? How much time will it take the passport control?

Thank you very much!