HK TO BK

HI, IM FROM PHIL. AND WE ARE PLANNING TO GO TO HK ON JULY 4,2015 AND FROM HK WE WANT TO VISIT BJ AND OUR TRAVEL TARGET DATE GOING TO BJ IS JULY7 AND OUR TARGET TRAVEL DATE GOING BACK TO HK IS ON JULY9 BECAUSE OUR FLIGHT GOING BACK TO PHIL. FROM HK IS ON JULY 10, 21:55. HOW CAN I HAVE A TICKET FROM HK TO BJ, WHERE CAN I BUY A TICKET, HOW MUCH IS THE TICKET FOR THAT PREFERRED DATES? AND CAN I BOOK A TICKETS THRU ONLINE? PLS GIVE ME OTHER/MORE INFORMATIONS. THANKS A LOT :)