24hr visa free transit plus tourism visa

I am travelling from LHR-AMS-PEK, where i will collect baggage and exit PEK airport. I will then check-in for my next flight from PEK-ICN (seoul), all within 10 hours from arrival in Beijing. I will return a week later from (Seoul) ICN-PEK, where i will begin a 2 week tour in China. After the tour i will travel from PEK-AMS-LHR. I plan to get a Tourism visa for the tour section of my travel, but will i need to apply for double-entry? or will i be able to use the TWOV for the 10 hour layover and then a week later use the tourism visa for my second entry?