It looks like this is some research facility for making genetic changes to people and animals, of course since I am the best such a species so far, it's no problem for me to get through the place! I also found my brother but he doesn't want to be saved, there is also some strange French terrorists guy which I helped escape.
After I'm out of the facility I am facing all the people of my old work site, some of them are somewhat supporting but most of them hates me, so not much choice except killing them, it was a bit mind-boggling to revisit that place! Now I am out and it is finally time to go to Hong Kong!