Commentary on Reports by Nie Rongzhen and Su Yu[1] Concerning Enemy Aircraft Disseminating Bacteria in Northeast China and Our Countermeasures (March 5, 1952) Carry out as instructed. This issue should be taken very seriously, and every effective measure must be employed to conduct epidemic prevention work. Mao Zedong, March 5. Printed from the manuscript. Notes [ ] Nie Rongzhen was then acting Chief of the General Staff of the Chinese People’s Liberation Army. Su Yu was then Deputy Chief of the General Staff of the Chinese People’s Liberation Army.