Pan Jun
When Pan Jun found out, he was so furious that he wrote a letter to his son as follows: "I have received grace from the State, therefore I should make it my mission to do my best to serve the State. When a young man like you comes to the Imperial Capital, you should behave in a respectful and humble manner, and seek to build ties with people who are known for their virtues and wisdom. Why do you choose to associate yourself with a defector from our rival state and even send him gifts? I may be far away from the Imperial Capital now, but I was very shocked, angry and worried when I heard about what you did. After you read this letter, I want you to ask the authorities to flog you 100 times as a punishment, and I want you to take back the gifts from Yin Fan."