The U.S government is poised to increase its scrutiny of the billions of American investment dollars flowing into Chinese high tech firms. But putting the policy into practice may be harder than many in Washington expect. The idea behind what is known as outbound investment screening is simple: while Washington has processes to review and block investment from China into the U.S., through the interagency body called the Committee on Foreign Investment in the U.S. (CFIUS), the government can�