Thus far, they (people posting in the China coins forum) only have evidence this grader (Dragon Lau) "upgraded" a 1934 Junk dollar from MS67 to MS67+. A wealthy investor offered him some hefty amount but he refused to sell. The main complain is this grader actually submitted his coins to PCGS which has violated PCGS rules. Whether PCGS will take action against him is what I am interested in. Since he joined PCGS, the grading of old China silver dollar coins have been "tightened" very significantly. Taiwanese dealer knows very well about this. Only for coins he submitted will receive high grades. I think only he knows how many coins he submitted himself. Some of those MS66 coins were sold in Stacks Bowers auction. It is interesting to know if those MS66 coins were in fact true MS66 to the eyes of the expert. Anyway, as of now, PCGS is still a preferred grading company for old China coins. I hope they do some proper housekeeping.