The present study attempts to use a comparative method of statistical analysis as a way to study in depth the unofficial regional administration and related organizations of Tseng Kuo-fan (January 1853 to March 1872; hereafter referred to as the Tseng administration, which represented the peak of this system in China) for the reasons why members departed. The author also includes statistical tables to present this complex set of information and thus allow readers to understand it at a single glance. The present study offers two important points; first, of the 542 members who joined the Tseng administration during each phase, 497 left. Of them, 286 left for "reasons unspecified," which accounts for more than half of the number. Next was 107 who were "expelled by Tseng," accounting for nearly 20 percent. Next was 84 who "died in office or became ill," accounting for 15 percent. These three represented nearly 90 percent. The others, accounting for slightly more than 10 percent, can be divided into four major categories; "leaving on friendly terms," "retiring," "being hired for other posts," and "being hired by the court." As a whole, they do not account for much, and no phase stands out for a particular reason or with a specific meaning. The second point is that most left for "reasons unspecified." As it turns out, this is because most of them did not achieve any subsequent fame, and thus were not recorded. Many of those who were fired, though they decreased with each phase, show that Tseng Kuo-fan was generally very strict. Of those who "died in office or became ill," many of them were killed in the T'ai-p'ing rebellion or after the death of Tseng Kuo-fan. The present study thus offers a glimpse at how members of the administration participated in and left the service of unofficial regional rule in the Ch'ing dynasty.