〃O they have long cherished a desire to go over to Cao Cao。 So when you sent them on the duty of destroying his camp； they did not do their best and so brought about this disaster。〃
Yuan Shao accordingly sent to recall these two to be interrogated as to their faults。 But Guo Tu sent a messenger in advance to warn them； as though in friendly guise； of the adverse fate that awaited them。
So when the orders reached them to return to answer for their faults； Gao Lan asked； 〃For what reason are we recalled？〃
〃Indeed I do not know；〃 said the messenger。
Gao Lan drew his sword and killed the messenger。
Zhang He was astonished at this demonstration； but Gao Lan said； 〃Our lord has allowed someone to malign us and say we have been bought by Cao Cao。 What is the sense in our sitting still and awaiting destruction？ Rather let us surrender to Cao Cao in reality and save our lives。〃
〃I have been wanting to do this for some time；〃 replied Zhang He。
Wherefore both； with their panies； made their way to Cao Cao's camp to surrender。
When they arrived； Xiahou Dun said to his master； 〃These two have e to surrender； but I have doubts about them。〃
Cao Cao replied； 〃I will meet them generously and win them over； even if they have treachery in their hearts。〃
＇e＇ The last king of Shang Dynasty was King Zhou； who was cruel and corrupt。 King Zhou had three uncles………Bi Gan； Qi Zi； and Wei Zi………who served as ministers。 When these three officials repeatedly failed to persuade King Zhou to repent； Wei Zi resigned his post； while Qi Zi pretended to be insane。 Bi Gan stayed and continued persuading the king； who later executed Bi Gan。 Later the Duke of Zhou overthrew Shang Dynasty and enobled Wei Zi； Qi Zi； and the wife and the so