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MUST CREDIT BACK TO THE ORIGINAL AUTHOR!!!!!! (TAN JIU). DO NOT USE FOR ANY PRINT/ PUBLICATIONS/ FOR PROFIT REASONS WITHOUT PERMISSION FROM THE AUTHOR!!!!!!!!!!!Previously: /1/ /2/ /3/ /4/ /5/ /6/ /7/ / 8/ /9/ /10/ /11/ /12/ /13/ /14/ /15/ /16, 17, 18/