Do I need to leave my original passport at China embassy (KL)to issue China tourist visa for 4 days?

hi ... Do I need to leave my original passport at china embassy (KL)to issue the china tourist visa for 4 days or I can instead give them a true certified copy of my first page ( which has all the information on it) and then when visa ready bring the original one???? ( as I need my passport during my trip) and another question is that when is the time for collection of visa is it only in the afternoon or in the morning also can collect the passports?