Elected by the party's provincial apparatus, 801 delegates represented 336,399 party members at the congress.[1] Of the delegates, 229 were in their twenties, 417 in their thirties, 129 delegates in their forties, and 26 delegates in their fifties or above.[1] By occupation, 183 of the delegates were classified by the central party apparatus as workers, 157 as peasants, 385 as office workers, and 76 were left unclassified.[1] The majority (359) of the delegates had only high school education, while 228 had only primary education and 214 had college education or above.[1] During Japanese rule, 291 delegates (36 percent) had been imprisoned, while 427 delegates (53 percent) had stayed abroad during Japanese rule.[1]