"Wait a minute, did I say that the two of them killed Mr. Jiang Kai?" Lang Xiaobai said calmly.

"So, you say that Ah Cai is the culprit, what are you talking about?" Xiao Bin vehemently refuted him.

"Alright! Now I'm going to tell you everything! However, this case is extremely grotesque and suspicious, and it is extremely difficult to explain, and there are still some things that I have not yet figured out. ”

Lang Xiaobai closed his eyes as if he was sorting out his head, and then said slowly:

"First, I'm going to start with the beginning. Mr. Xie Yunqing, the grandfather of the Lady and Juanzi sisters, hired this man named Ah Cai seven years ago, five years before he died. He was only forty years old.

"The person who recommended Ah Cai to Mr. Xie Yunqing was a wealthy businessman with a high status. However, the merchant later committed suicide due to a lack of business and bankruptcy not long after.

"Outwardly, Ah Choi is a loyal and down-to-earth person, but in fact he is a downright villain. However, because he was diligent in his work, Mr. Xie Yunqing, who was kind-hearted and immersed in alchemy, believed him easily.

At that time, Ah Cai cared for the young Juanzi, so she also believed in Ah Cai.

In this way, Ah Cai became the most trusted person of the old man and his little granddaughter Juanzi. Gradually, Ah Cai revealed his true face. He found that Xie Yunqing was fanatically obsessed with experiments in chemistry and alchemy, so he went to flatter Mr. Xie Yunqing, saying that he himself was also very interested in this matter.

When the old man heard this, he was very excited, so he asked him to be his assistant and cooperate in his own experiments. Of course, at the beginning, Ah Cai was not allowed to enter the laboratory by Mr. Xie Yunqing, but only asked him to wipe and clean the test tubes. However, Ah Choi is a person with a clever mind and quick hands and feet. As long as he was assigned to him, he could complete it very smoothly, so the old man trusted him very much, and after a short time let him go to the laboratory.

At that time, the old man was frantically immersed in the study of alchemy, the method of refining gold powder from cheap metals such as lead.

Ah Cai, who knew this well, had the idea of stealing the secret recipe, so he worked even harder for the old man Xie Yunqing.

Old man Xie Yunqing trusted Ah Cai more and more, and asked him to assist him in conducting many experiments. However, he was still not allowed to participate in the experiments related to alchemy, and the old man did them alone in the middle of the night.

"But this vital experiment, the old man does not do it in the laboratory, but in the pigeon house on the sandbank. The old man installed all kinds of experimental equipment in that basement, and everything was carried out by himself, no matter how big or small, without Ah Cai interfering, and he was not allowed to go to the basement casually.

Although Ah Cai tried to sneak into the basement several times, he did not realize this attempt because of Mr. Xie Yunqing's careful vigilance.

So Ah Cai thought, can gold really be refined? Alchemy has been practiced for thousands of years, but there is no record of it in either historical texts or biographies. This is nothing more than the wishful thinking of a wealthy man, but in fact it cannot be realized at all, and this kind of thing that cannot be explained by science is simply impossible. Is this old thing babbling? Or are you too keen on experimentation and go insane?

Thinking like this, Ah Cai felt that the idea of him racking his brains to steal the alchemy method in the past was really stupid. However, when he learned that the old man had refined the gold powder, and had also given a handful to the notary Yan Junqing, he was simply surprised. However, he was indeed a clever villain, and he immediately thought that this old guy must not have refined gold, so he didn't know where to pick up some gold dust and give it to the notary Mr. Yan Junqing, and lied that it was refined by himself.

"It must be like this! But where did he find the gold dust in his hand? The old man had never had a chance to go out, and he had never been seen outside of the manor...... In this case, there must be a place around the estate where gold powder is produced, and this place must be located next to a small island in the laboratory. Just search around there and you might find gold. Is that what you think? Ah Cai?"

Lang Xiaobai asked Ah Cai, who fell to the ground on his back.

Ah Cai smiled sinisterly and treacherously and said, "Yes, your brain is very useful, not only uncovering my true face, but also seeing through my plan."

Hearing his words, the two sisters were shocked and their eyes widened involuntarily. Because Ah Cai, an old servant who had always been loyal and simple, suddenly seemed to be reborn, and spoke in a rogue tone.

"Haha, you're finally in your original form. Your idea is very right, Ah Cai, Mr. Xie Yunqing has not refined any gold sand and gold dust at all. ”

Lang Xiaobai said, turned his head to Xiao Bin and said:

"I've never believed in this kind of anti-science thing. Mr. Xie Yunqing told Mr. Yan Junqing that he had succeeded, but this was simply a fantasy.

"It is quite possible that the old man found some gold powder or sand grains, but claimed to outsiders that he had refined them. I thought the gold sand must have been found near the manor, so I searched the hills and the valley where the three willows were, even the bottom of the river.

"It was at this time that I suddenly remembered the name of the river, which was called the Gold Rush River. I wondered, is there really gold in the gold rush? So, I took a small boat every day and pretended to be fishing, in fact, I was exploring the bottom of the river. I collected some samples of sediment from the bottom of the river and the soil on both sides of the river for study, but I did not find a single grain of gold sand. ”

Lang Xiaobai turned his head to stare at Ah Cai and said:

"I suppose you've done the same things I did, right? And you didn't find the gold sand. So you start believing again, Mr. Xie Yunqing has indeed succeeded in refining gold.

"Then you start looking around for the secret recipe for refining gold, but you find nothing. Not long after, Mr. Xie Yunqing passed away. You think that the will contains a way to refine the gold powder, so you steal it out and look at it, but you can't find anything about alchemy. At this time, you decided that you alone could not find the secret document about alchemy, so you confessed the truth of the matter to Mr. Jiang Kai and asked him to assist you in finding the document, right?

"Because of the bad business, Mr. Jiang Kai is facing the crisis of bankruptcy, so he readily agreed to your suggestion.

"So the two of you began to discuss the contents of the will in secret. The will stated that Mr. Xie Yunqing would divide his estate into two and leave it to the Xie Yan sisters, and the dividing line was a straight line connecting three willow trees to the main entrance and pillars of the main house, but the land inherited by Juanzi was larger, including most of the river.

"So the two of you are secretly thinking: Mr. Xie Yunqing prefers his sister Juanzi, and he will definitely leave the secret of alchemy to her, which is why he is so unfair in the distribution of land. I'm not wrong, am I? Ah Cai?"