In ancient times, there was a Langzhong Yuan Xinjia, who was very famous in the local area. One day Yuan Xinjia never came back after his visit, and his family went to the yamen to complain, but there was no clue or clue about the matter, so the yamen never gave a decent explanation.

Li Er, a local melon farmer, planted several acres of watermelons, which was strange to say. There were several watermelon seedlings growing particularly well in the northwest corner of Li Er's melon field, which were obviously thicker than the watermelon seedlings next to him. Li Er took care of them more attentively when he saw them, and when the results arrived, they were actually twice as big as ordinary watermelons. Many local people came to watch, and local Zhang Juren also wrapped up all the watermelons produced by the watermelon seedlings at a high price of six dollars a catty of silver, so Li Er earned a lot of money.

Not long after, a new county magistrate named Zhou Qihai was appointed in the county, and when he heard about it, he also came to see it. Zhou Qihai was good at reasoning, and he saw that Li Er's melon field was growing normally, only a few melon seedlings in the northwest corner were growing particularly well. He remembered the case recorded in the "Dragon Tu Koan" of the previous dynasty: if a person was buried in the ground, the grass on it was much taller than ordinary grass. So he ordered someone to dig down in the northwest corner of the melon field, and when he dug about four feet deep, he dug up a male corpse.

Seeing this, Zhou Qihai ordered Li Er to be brought back to the yamen for interrogation. Li Er knew nothing about this, and went to the lobby to kowtow like tampering with garlic, claiming that he was wronged. Zhou Qihai saw that he did not seem to be lying, but he was temporarily imprisoned because of the seriousness of the case. The yamen first started with the male corpse, and the inspection found that the male corpse was hit on the head from behind and died. No valuables were found on the deceased, but there was a red sandalwood hairpin on the bun. Although the hairpin was valuable, it had a simple appearance. Maybe it was because of this that the murderer let it go.

Taking off the hairpin, there were three words "Jade Qilin" written on it. A scribe in the yamen knew that this Jade Qilin was Yuan Xinjia's nickname, so Zhou Qihai called the Yuan family to identify the body. The Yuan family saw that it was Yuan Xinjia. Zhou Qihai asked the Yuan family to take the body back for burial, and he continued to investigate the cause of death.

Zhou Qihai learned from Yuan's family that Yuan Xinjia often went to Zhang Ju's house for medical visits a few days before he disappeared, and finally went to Zhang Ju's house on the day he disappeared. Because Zhang Juren was very famous in the local area, Zhou Qihai personally came to visit Zhang Juren. Zhang Juren did not hide anything and told Zhou Qihai that his father was seriously ill and almost drove west. Thanks to Yuan Xinjia's careful diagnosis and treatment, he turned the crisis around. In order to express his gratitude, Zhang Juren secretly put one hundred taels of silver in Yuan Xinjia's medicine cabinet. Zhou Qihai asked Zhang Juren why he did not give the silver ticket to Yuan Xinjia in person. Zhang Juren said Yuan Xinjia had a rule that only one tael of silver was accepted for diagnosis and treatment. If the patient was poor, he would not take a penny. If I gave him the silver, Yuan Xinjia would definitely not accept it, so he secretly ordered someone to put it in his medicine chest.

After listening to Zhang Juren's words, Zhou Qihai seemed to have thought of something, so he asked who Zhang Juren sent to put the silver ticket in Yuan Xinjia's medicine chest. Zhang Juren said Zhang Cai, the housekeeper of the mansion, and Zhou Meng, guardian of the hospital, put it together. Zhou Qihai asked Zhang Juren to call the two for questioning, and Zhang Juren said with a slight embarrassment that Zhang Cai was immediately visible in the mansion, that Zhou Meng had resigned from my job a few days ago. Zhang Juren asked when Zhou Meng left. But did he leave before and after Yuan Xinjia disappeared? Zhang Juren said he left before and after Yuan Xinjia disappeared.

Zhou Qihai felt that there seemed to be something wrong with Zhou Meng. After checking, he found Zhou Meng living near the melon fields of Li Er's family. He did not scare the snake, but sent someone to observe secretly. One day, the people who observed it secretly found that Zhou Meng came to a restaurant and talked to someone. After that, Zhou Meng seemed to give the person a silver ticket, while the other person handed over a few land deeds to Zhou Meng. The people sent to observe were also capable people. Seeing this scene and feeling that the time was ripe, he went forward and arrested Zhou Meng and took him to the county yamen. The silver ticket Zhou Meng gave to the person who happened to be a hundred taels in denomination. After being identified by Zhang Juren and the housekeeper Zhang Cai, it was the silver ticket that was placed in Yuan Xinjia's medicine chest that day. At this time, Zhou Meng was also unable to defend himself, so he confessed truthfully.

When Yuan Xinjia came out of Zhang Juren's mansion, it was already very late, and, of course, he did not know that there were one hundred taels of silver in his medicine cabinet. Zhou Meng followed Yuan Xinjia to a secluded place, beat Yuan Xinjia to death with a wooden stick from behind, and looted his belongings. To hide, Zhou Meng dragged Yuan Xinjia's body to Li Erguatian and buried it secretly in the northwest corner of Guatian.

So far, Zhou Meng was sentenced to beheading for murder and robbery, and Li Er was acquitted. In order to make up for Li Er's loss, Zhou Qihai packed all Li Er's watermelons and distributed them to the local people. Strange to say, since then, the melons in Li Ergua's field have grown very well every year, and they are sweet and sandy, and his melons sell very well every year. He felt that his melons sold well because Yuan Xinjia was a good person and took care of the poor, so he named his melons Qilin Melons later.