As Beijing changes the rules of the game for Chinese companies at home and abroad, Jim Cramer urges investors to be cautious. Author: Frank Hartzell In China’s unique cross between capitalism and communism, the indicators are now reading red, Jim Cramer warned in a recent Real Money column. Cramer: For Investors, China Offers the School of Hard Knocks. Read more: 'We really don't know which kinds of companies China is going to target, but I see one pattern, and you should know it before you put down your cash.' In a recent No-Huddle Offense segment from his Mad Money TV...