means: shiver; it means trembling without being cold. Describes the heart is very scared. From "Records of the Grand Historian: Biography of Cruel Officials", it records that "there were all reported to kill more than 400 people on that day, and then the county was shivering."
According to legend, during the reign of Emperor Wu of the Western Han Dynasty, there was a man named Yisan, a female doctor. Because the empress dowager's illness was cured, the empress dowager so favored her very much. Yisan had a younger brother named Yi Zong. Emperor Wu of Han heard that Yisan cured the empress dowager's illness, and loved the house and the wuwu, and also gave Yi Zong an official.

When he was the county magistrate of Chang'an , he acted according to law and was ruthless, which greatly improved the local public security. Therefore, Emperor Wu of Han thought he was very talented and promoted him to Nanyang prefect.

At that time, there was a commander in Nanyang City who managed taxes. He was called Ning Cheng . This person used his power to dominate the countryside and bully the people, and the people were afraid of him. When he heard that Yi Zong was coming to Nanyang, he led his whole family to the city gate to greet him. Yi Zong knew about his character, so he deliberately ignored him. As soon as he took office, he began to investigate and punish him. Any guilty ones were killed, and Ning Cheng did not escape. The famous local clans fled Nanyang for fear of being investigated and punished. After

. Yi Zong went to Dingxiang again as the prefect. At that time, the public security in Dingxiang was in chaos, and as soon as Yi Zong arrived in Dingxiang, he executed all the serious prisoners in the prison. Some families who came to the prison to visit were also executed. Although it was a hot summer, the people living in Dingxiang were still scared to death when they heard the news.
