from the 1st to the 19th CPC national congress understanding the 20th CPC national congress from the 17th to the 20th century from the 8th to the 21st centuries from the end of the 19th century to the present from basic to state of the art computational techniques 19th CPC national congress from the poverty to the wealth of nations Journey of the Communist Party of China：from the 1st to the 19th CPC national congress 并列题名：19th CPC national congress