hi could anyone know the bus that going from hangzhou to beijing

Yes, one long-distance bus at HZ North Railway Station can take you to Beijing. The schedule is at 14:15. The ticket fare is about CNY400 per person. Duration is about 16 hours.

Or you can take high-speed train from HZ East Railway Station. The schedules are from 07:18 to 16:14. It takes 5 to 6 hours on the way. The ticket fare of first class seat is about CNY907 and second class seat is about CNY540.

You can choose the way you like. :-)

Thank you very much.