In 716, another locust infestation occurred, and Yao again ordered the capture and killing of locusts. Ni Ruoshui (倪若水), the prefect of Bian Prefecture (汴州, roughly modern Kaifeng, Henan), resisted the orders, claiming that Yao's strategy was carried out by the Han Zhao emperor Liu Chong and failed miserably, and that only if people in power enhanced their virtues could the locusts be eliminated; Ni went as far as refusing to have imperial censors enter Bian Prefecture to carry out the order. Yao wrote a formal order to Ni, stating: