Mike Sargent is listed on the PCGS Asia site as the lead grader. Says he has graded over 200,000 Chinese coins. PCGS has only been grading Chinese coins a short time and one guy has graded that many? China must be growing much faster then we know. It must be over 10% of volume now. PCGS grades just over 2M coins/yr. One guy has graded 10% of that. There must be more than just one grader.