During the Ming Dynasty, when King Zhu Di of Yan launched the Battle of Jingnan and led his army to attack Jinan, he was resisted by the defense general Sheng Yong. He could not attack for a long time, and was ambushed in Dongchang Mansion. Zhu Di almost died in the chaos. He said to the soldiers bitterly, "One day I will kill Dongchang Mansion, and I will slaughter the city here for three days!"

When the army was dispatched again, Zhu Di adopted a steady and steady strategy, and finally captured Jinan, and then occupied the entire Shandong Province, and Dongchang Mansion was naturally also beaten down. At the celebration banquet, Zhu Di said fiercely: "I said that after occupying Dongchang Mansion, the city will be slaughtered for three days, and we must not break our promise!"

When the soldiers heard this, they were all taken aback. If the city was really slaughtered, wouldn't it lose the hearts of the people? Someone had the courage to persuade Zhu Di to take back his life, but he didn't expect that he would be so determined by the weight.

Zhu Di had a general under his command named Gu Cheng. Seeing that the crowd couldn't convince Zhu Di for a while, he took a step forward and said, "Your Highness, the last general dares to make a request, and I hope your Highness will approve."

Zhu Di said impatiently, "If you want me to change my mind, save it!"

Gu Cheng hurriedly said, "The last general didn't dare, but the last general passed by this place and was intercepted by the strong man. Thanks to the help of the people here, the last general saved his life. The favor of saving his life has never been repaid, so the last general wants to leave a safe place when the city is slaughtered. Even if he only gives a place to shoot, the last general can explain to others, and it is not a waste of the kindness of the year."

When Zhu Di heard this, he said cheerfully, "I will definitely give you face." After that, he smiled "hehe" and said, "General Gu, I hope you can prepare a hard bow and crossbow, and shoot as far as you can!"

Gu Cheng thanked Zhu Di and returned to his seat.

The next day, the soldiers came to a street in Dongchang Mansion early, all wanting to see it. Everyone thought to themselves that Gu Cheng's arrow could only be shot a few hundred paces away, and it could only save dozens of families, which was of no avail at all! Just as he was thinking about it, he saw Zhu Di riding a horse and came here surrounded by guards. He glanced at the generals and asked loudly, "Is Gu Cheng here?"

Gu Cheng arrived a long time ago, and hurriedly bowed on horseback and saluted, saying, "Your Highness, the end will be here!"

Zhu Di said with a straight face, "General Gu, are you ready?"

Gu Cheng nodded. "Everything is ready."

Zhu Di said, "In this case, you can use as much strength as you have, and shoot as far as you can. I guarantee that the people in this arrow are safe and will never break my promise."

Gu Cheng agreed, turned the horse's head, took off the treasure eagle bow, and pulled out a wolf tooth arrow from the arrow bag. Just as he was about to take the bow and shoot the arrow, Zhu Di suddenly said, "Wait a minute!"

Zhu Di brought the guards to Gu Cheng and said, "General Gu, let's put the villain before the gentleman. How far and near did you shoot this arrow? You have to find someone to be a witness."

Gu Cheng said, "The prince has carefully about who to ask to be a witness, then let the prince decide."

Zhu Di did not refuse either. He looked at Hu Qian, the guard next to him, and said, "Hu Qian, let you be the witness."

Hu Qian agreed, shook the reins, and the horse took a few steps forward and stood still on the street.

When everything was ready, Gu Cheng bent his bow again, and before the arrow in his hand could be shot, suddenly Hu Qian's horse was stimulated by something, and with a hissing sound, it rushed forward, and in the blink of an eye, it ran 100 paces away.

After a long while, Hu Qian ran back to his horse. He saw that his face was sweaty and he came to Zhu Di. Before he could speak, the arrow hanging from the horse's tail fell to the ground with a "click."

Zhu Di asked with a cold face, "Hu Qian, what's the matter with you?"

Hu Qian's heart froze and replied, "Your Highness, it's all my fault for failing to manage my horse well. Please punish me heavily."

Zhu Di waved his hand and said, "Forget it, tell me how far the horse ran."

Hu Qian said with trepidation, "I ran around Dongchang Mansion."

Zhu Di asked, "Are you telling the truth?"

Hu Qian replied, "I dare not speak the slightest nonsense."

After listening, Zhu Di said to Gu Cheng, "General Gu, this is God's will! Since that's the case, I can only take back my fate."

Gu Cheng hurriedly got off his horse, knelt on the ground and said, "Your Highness is wise."

When the soldiers next to him took a look, they also dismounted their horses, shouting, "Your Highness is wise."

After the news spread, the people of Dongchang Mansion were grateful to Gu Cheng and even set up a shrine for him.

Later, Zhu Di led the army to Nanjing and ascended the throne, which was later called Emperor Chengzu of Ming. Gu Cheng was also sent to Guizhou to guard because of his military achievements and became a duke.

An old friend asked Gu Cheng if it was really such a coincidence that he stroked his beard and asked, "What do you think?"

In fact, many things were not coincidental at all, but artificial. It turned out that after a night of thinking, Zhu Di also felt that the city should not be slaughtered, but because of face, he could not directly take back his life. Fortunately, Gu Cheng made a request for a place to shoot the day before, giving Zhu Di a chance, so he arranged for Hu. Hu's ponytail was braided a few times in advance. When Gu Cheng was about to shoot, Hu Jin poked the horse's butt with the hilt of his sword in his hand, and the horse ran out. Gu Cheng, who is good at reading words and expressions, saw the opportunity and shot this "coincidence" arrow.