(Bloomberg) — FBI Director Chris Wray urged companies to work more closely with law enforcement to stop foreign hacking, as he reiterated warnings about Chinese infiltration of American information networks. Wray, addressing the Economic Club of New York by video Thursday, said hackers backed by the Chinese government made up the lion’s share of cyber attacks on American enterprises and that their methods and strategies were becoming more sophisticated. Hackers often work with company insiders to target proprietary information, while foreign companies sometimes try to use transactions like a joint venture partnerships to gain access, Wray said. “Most of the…