Abstract: This paper is a continuation of our new exploration of Hua’s economic optimization theory developed in 1,2. We discuss four issues on the research of China’s input-output table of 2017: stability analysis, product rank and classification, prediction and adjustment, structural optimization. Further, applying our method to the China’s input-output tables of 2007, 2012 and 2017, we compare and analyze these tables. The results obtained demonstrate the surprising similarity of product ranking and classification of the tables which spanning 15 years. Once again, the reliability of the previous theory is proved.