I have been hypothesizing that, in the protoplanetary disks, the dust masses might have been systematically underestimated by at least one order of magnitude, while the dust maximum grain sizes have been systematically overestimated by 2~3 orders of magnitude. I will present a few high angular resolution case studies to support this hypothesis, and also our new systematic surveys that imply that our hypothesis is generally true. I will also introduce the physical implications of our hypotheses.
