Sign in and get rich in farming

Entering from the entrance, there is a short corridor with stone lanterns on both sides. Tan Langxu lit it first and stood there waiting for everyone to gather.

"At present, apart from the maze, there are no mechanisms set up." Mo Shougui walked to the front of the corridor and whispered a reminder while looking at the dark corridor ahead.

Tan Langzhu nodded, but the guard who came in last still came up to him, took the torch, lit it in front and led the way.

"It seems like the lamp oil will never run out." Yu Hongdou looked at the light extending all the way and stared at it for several times with a mixture of complaints and admiration.

They lit all the lights the last time they came, so of course they wouldn't blow them out in style when they left. Who would want to go through the trouble?

Not to mention that this is a stone lamp carved on the wall, even if an ordinary lamp was knocked over on a stone wall, stone roof, or stone floor, it would not burn.

But it is impossible to say that there is no ventilation here. After all, a group of people once lived here. If there was no ventilation, they would have suffocated to death long ago.

Moreover, they could feel a slight breeze as they walked in the corridor. It was obvious that this all-stone building had vents.

Therefore, the argument that a candle flame can be extinguished by vacuum is also invalid.

Tan Yanlin was curious about what Yu Hongdou said, so he went closer to the stone lamp to observe it. After looking at it for a few times, he smiled and raised his hand to wave at Yu Hongdou.

"?" Yu Hongdou came over and stared at the stone lantern, but still didn't notice anything.

"There is a row of pinholes under the wick, probably connected to some mechanism. If the lamp is burned for a long time and there is no oil in it, it will automatically be refilled through the pinholes."

After Tan Yanlin pointed at the lamp and finished speaking, he saw Yu Hongdou, who was a head shorter than him, standing on tiptoe to see. He thought it was funny and cute, and wanted to help her, but due to the difference between men and women, he could only look at Yu Song.

Yu Song stretched out his arms from behind his sister, held her waist and lifted her up to the height of the stone lamp.

Yu Hongdou stared at the wick carefully for a few seconds and found that there were indeed a few needle holes hidden there. She couldn't help but look at Tan Yanlin with admiration.

Be as meticulous as a hair!

"Since there is oil, it will eventually run out. I guess the lamp oil added by the previous people who lived here has not been burned out yet. If it comes a few more times, I'm afraid it will be out of use." Tan Yanlin made a prophecy.

After all, lamp oil is quite expensive. Even if the people living here are rich, it is impossible to buy it in large quantities.

"If we collect the lamp oil from so many lamps, it will be enough for the people on the farm to use for three months." Qian Sanmei muttered softly.

Thanks to the young lady, Anbei Village is now rich, and every household can afford to light lamps and burn candles. In the past, everyone had to work in the dark, and when they couldn't see anything, they would just go to sleep.

Yu Hongdou patted Qian Sanmei on the shoulder and said, "Let's make our own candles later, and then we can use them however we want."

In fact, Yuwangzhai now also sells scented candles, but for ordinary people, candles themselves are luxury goods, and scented candles are something they cannot afford or use.

Rich families, on the other hand, prefer to use incense and do not have much demand for candles, which makes Yu Hongdou's scented candles somewhat unsatisfactory.

Yu Hongdou thought that instead of wasting essential oils on making scented candles, it would be better to change the track and make fun candles.

She hasn't figured out the specific implementation method yet, but that doesn't stop her from comforting Qian Sanmei at this time.

Qian Sanmei was indeed comforted by her own young lady. She smiled shyly and quietly shrank behind Yu Hongdou, cautiously alert to the situation around her.

"This secret room is composed of two sets of eight trigrams, the outer circle is Kan and the inner circle is Kun. I was wondering what the meaning of this trigram was, but when Hongdou came back and mentioned the eight-treasure mechanism box, I suddenly understood.

"It turns out that the eight trigrams inside and outside have mechanisms that can be changed. The gates of life and death can be changed at will. This is the biggest mechanism of the underground palace."

Mo Shougui touched his chin and sighed. He was careless when he came here last time. He only thought about the mechanisms hidden in the underground palace and never thought that the underground palace itself was a big mechanism.

"Who would have thought that such a huge project would be just to build a huge mechanism? I wonder how much manpower and material resources were consumed to build this underground palace." Yu Hongdou comforted the teacher in disguise.

"Yes, it is not easy to build such a huge underground palace. The strange thing is that there is not even a trace or rumor about it." Tan Yanlin also agreed with Yu Hongdou's statement.

Even now, the only underground palace that can be compared to this size is the imperial mausoleum.

"Time has passed, the world has changed, wars and disasters have obliterated countless secrets of this world."

Mo Shougui just sighed and was not annoyed, but he still felt relieved to be comforted. He skipped this topic and continued to introduce the underground palace.

"We entered from Xiakan, entered the first floor, turned left into Gen, opened a door and crossed to Zhen." Mo Shougui was talking about the route they took the two times they came here.

The leading guard and Tan Langxiu did as they were told, and while moving forward they did not forget to check whether there were any mechanisms on the ground and walls.

"Master Mo, look." With the help of the light, Tan Yanlin looked around every two steps, and suddenly stopped while walking.

Tan Yanlin was pointing at the square stone above their heads.

"I counted and found that every twenty steps, there was a square stone above my head. It was probably some structure used when the underground palace was built. However, the color of this square stone was slightly different from the previous ones. It looked darker, as if it was deliberately hidden."

Tan Yanlin turned around and pointed to the piece twenty steps ago, indicating that they should compare it.

Yu Hongdou craned her neck and stared at the square stone that Tan Yanlin mentioned for a few seconds, then turned around and ran back to look at the previous one. Upon careful inspection, the colors of the two stones were indeed different, but the difference was probably just the difference in chromaticity.

This person is definitely not nearsighted or color blind! Yu Hongdou stared at Tan Yanlin's eyes with admiration. Hmm, his eyelashes are really long, and his eyes are...pretty good-looking.

Tan Yanlin looked at the little girl who was staring at him with cross-eyes with amusement, raised his hand and slapped her on the head. When he saw Yu Song doing this before, he wanted to try it.

Yu Hongdou covered her head, snorted, and rolled her eyes at him fiercely. She returned to her teacher and studied with him whether there was any problem with the square stone above her head.

"Hongdou, use the slingshot to shoot." Mo Shougui looked up for a long time, various civil engineering structures flashed through his mind, and finally he settled on a picture that only appeared in books.

Yu Hongdou followed the master's order without asking any further questions. He took out his slingshot and fired a bullet at the center of the square stone with a color difference two degrees downward.

The dull sound of the iron bullet hitting the stone was exceptionally loud in the silent passage, and even had an echo, spreading far away in waves.

After a moment, the sound in the passage disappeared, but the square stone above remained motionless.

Yu Hongdou was a little disappointed and was about to comfort the teacher, but she heard Qian Sanmei behind her stumbling and shouting in surprise: "Miss, then, then it's open..."