visa validity means you can use this visa to enter China any time during this 6 months. Not the duration of stay in China. generally, the processing time for a China visa is 4 working days through a Chinese embassy or consulate.

hello, if your visa is issued outside of China, you should go outside every many days.I fyou want to stay in China without leaving, you should extend your visa or change your visa type. more information about visa, you can tell me. I will give you some suggestions.Good trip.
Monica