They were using a 100 years old map, that was why they did not know the building is the Chinese embassy. Same old excuse they used in the past, they better come up with something new. I do not understand why the security guards in the embassy did not arrest or even shot at those policemen since they were in the Chinese embassy and using force. If you look at any US embassy in a foreign country, it has heavily armed marine guards who are ready to shot and arrest anyone inside the embassy in an event similar to this one. Looks like China is not doing a good job in protecting its embassy, who to blame? Don't blame the U.S.