what is the cost of the hourly lounges avaible on the capital international airport, beijing, china?

Different kinds of lounges have different prices.
For the lounges in T3C, the fare is 100RMB for the first hour, 150RMB for two hours, 200RMB for three hours, 240RMB for four hours, 300RMB for 4 to 6 hours and so on.
For the lounges in T3E, it is 180RMB for the first five hours.
For lounges in T2, it is 100RMB for the first hour, 160RMB for two hours, 220RMB for three hours, 280RMB for three hours, 340RMB for 4 to 6 hours and so on.
The prices I listed here are all for the standard rooms.
I suggest you look for more detail information on the official website of Capital Airport.