i need to go to hongkong from guilin kindly advice the time and price for the same

You can fly fro Guilin to Guangzhou first! Then go to Guangzhou East Railway Station to take a train to HK in two hours! The air ticket fare varies from time to time, so I suggest you search the exact cost at the flight page of this website. The train costs 195HKD per person!

The best method is the flight and as I know, the HK Airlines, Cathay Pacific Airways and Dragonair run the direct flights. The flight takes about one hour and a half.
But for the price, it is hard to tell, because the price is not fix for its discount. It is suggested to look for more information on the official website or on the Flight Section on this website and then book the tickets in advance.