ATHENS — The Chinese embassy in Athens lashed out against U.S. Ambassador Kimberly Guilfoyle on Wednesday over her recent criticism of Beijing's investments in Greece. Guilfoyle’s comments were a “malicious slander” against Sino-Greek trade relations and a “serious interference in Greek internal affairs,” an embassy spokesperson said in a written statement. Last week Guilfoyle said China's state ownership of the Port of Piraeus, Greece’s largest such facility, was “unfortunate” and suggested it