Pan Ji-xun was one of the most outstanding experts at water conservancy in ancient China, whose achievements related to the
administration of officials, people's livelihood, and the reform of taxes and labor, etc. During the middle Ming Dynasty, he was sent to Guangdong, the most complex and most difficult place to administrate, as a
patrolling censor. During his more than two years tenure, he energetically rectified the administration of officials, continuously investigated and dealt with three big cases, including Caoyang county
magistrate Cai Mingfu, assistant of Haifeng county magistrate Zhu Jie, and Boluo county magistrate Shu Zhuan, which shocked the Guangdong officialdom. The biggest contribution of his patrolling Guangdong was that he carried out “The Law of Averaging Community”, the predecessor of taxes and labor system “Yi-tiao-bian Law” by Zhang Juzheng. It was the success of Pan Jixun's‘The Law of Averaging Community’in Guangdong that made Zhang Ju-zheng's “Yi-tiao-bian Law”, which was carried out all over the country and had far-reaching influence to later ages in early Wanli years.