Here http://explorer.nemchina.com/#/s_account?account=NCVQTSQVE77W7VJC35FWQ2QNPIYDTFXZYNPJ5GOG we can see prover:proof mosaic on this account, but this account doesn’t exist in NEM richlist http://explorer.nemchina.com/#/mosaic?m=proof&ns=prover at all.