Wang Can
Pan Jun was born in Hanshou County (), Wuling Commandery (), which is located northeast of present-day Changde, Hunan, towards the end of the Eastern Han dynasty. After he reached adulthood around the age of 20, he studied under the tutelage of the scholar Song Zhong (宋忠; also known as Song Zhongzi 宋仲子). He was known for being intelligent, observant, and capable of providing well-thought and well-reasoned responses to questions. Wang Can, one of the "Seven Scholars of Jian'an", once said that Pan Jun was an extraordinary talent. After receiving such high praise from a famous intellectual like Wang Can, Pan Jun became more well known in his home commandery. The Administrator of Wuling Commandery appointed him as an Officer of Merit () to serve in the commandery office.