Shen Pei
In the spring of 204 Cao Cao crossed the Yellow River again and, mindful of the logistical problems for him to operate north of the Yellow River, started several waterworks projects to ease the transportation of supplies. While these works were under way, Yuan Shang apparently thought it safe to renew his attack on Yuan Tan in Pingyuan again, and left his loyal supporter Shen Pei to defend Ye. Some within Yuan Shang's camp found his priorities questionable, so when Cao Cao indeed advanced on Ye some time around the second or third month, the city's defenders under Su You (蘇由) intended to rebel and capitulate Ye to Cao Cao. The scheme was discovered, its plotters suppressed by Shen Pei within the city, and Su You fled to Cao Cao.