"For many historical reasons, most of our troop cadres, and particularly high-ranking cadres, are now advanced in years, and they do not have a sufficient knowledge of culture and science or of modern military science. In the past year, we have readjusted leading groups of the army units in line with the principle of promoting outstanding younger cadres and helped PIA men learn science and acquire general knowledge extensively and thoroughly. As a result, the ranks of our army's cadres have made big strides in the four modernizations, yet they still cannot meet the needs of army building."