After being caught by the boss, Gan Long had to write a couplet to pay his debts. When the boss saw that the couplets were written fairly and neatly and the calligraphy was magnificent, he immediately released Gan Long. Qianlong was the longest-serving king in the Qing Dynasty and the king who went out of the palace the most times. He doesn't want to learn about people's livelihood through the passbook in the deep palace. He prefers to go out and have a look by himself. He thought that only on-the-spot investigation could he come up with a real way to govern the country, and many interesting things happened in the process of going out of the palace incognito.

At that time, Gan Long came to the Jehol Summer Resort to escape the heat, and observed the people's feelings and inspected the dam. Although he traveled incognito, many local officials still knew about it and waited behind Gan Long every day, which made Gan Long very tired. One day, while the officials were busy, he sneaked out with only one bodyguard and walked on the street of Jehol to experience the folk customs. When he was wandering around, Gan Long was attracted by a smell. It was just lunch time, and Gan Long went into a restaurant to eat.

After a hearty meal, Gan Long habitually lifted his leg to go, but was stopped by the bartender and asked Gan Long to pay the bill. At this moment, Gan Long realized that he didn't have a penny. After all, as a king, he doesn't need to worry about his daily food and clothing. Even if someone arranged outside Zhagong, Gan Long didn't have the habit of carrying money with him. Besides, he is a king himself, and the whole world belongs to him. Where does he need to spend money on things? But at the moment, no one knows that he is a king.

As soon as the deadlock broke out, the restaurant owner came out. When he saw Gan Long's well-dressed and extraordinary behavior, he also thought that he was not a poor man with no food, but he had no money to pay the bill. Finally, the boss came up with a good idea. He asked Gan Long to leave a couplet with pen and ink, and Gan Long readily agreed. He finished the dragon and snake couplets, and then used them to pay for meals. The boss saw that the couplet was well written, so he framed it and hung it by the door. It was later recognized as the handwriting of Emperor Qianlong. The boss didn't know the truth until now, so he immediately treasured it.