Zombie mode!

I want some information on the China Zombie Mode. Maybe it's going to be added on this version and I need some information from the people that played the china version/know about the zombie mode. Are the zombies impossible to kill? Well I played Combat Arms and it's IMPOSSIBLE to kill one. I mean it took me with a shovel and one of my teammates with a gun like 30 seconds to kill an afk zombie... Can someone give me some information? And sorry if I'm not suppose to post about other games I wanted a good example...

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