I'm a zombie, what's the point of awakening the yellow-haired system?

The end of the world is coming, zombies are everywhere, Zhang Chen is harmed by the Virgin School Beauty, and bitten by the beautiful zombie. Just when he is desperately waiting to die, he actually awakens the Yellow Hair System?! As long as he performs the Yellow Hair Behavior, he can continue to evolve and become stronger?!Female zombie, you bit me just now? Now I let you bite me!Virgin school beauty, open the door for you zombie, if I let you in now we’ll be even!As Zhang Chen becomes stronger and stronger, more and more girls come into sight. Madam, you don’t want your husband to turn into a zombie, do you?