Siheyuan: the System Ran Away, but I Still Killed Indiscriminately

Physically traveling through the 1960s, I landed in a black house, and the system ran away again at the beginning. After finally finding a place to stay, I was told that this courtyard was the one in "Qinman Siheyuan". Moreover, the identities of those beasts do not seem to be as simple as in the TV series. They have some secrets hidden in them that will lead to death in the light of day. Although they are usually hostile, they are unusually united when something goes wrong. ‏Without the system, these beasts have been strengthened again, and it's a complete start to the collapse of heaven. But so what, I am on top of the human race, proud of the world, and without a system, I will still kill indiscriminately!