In Wandi Mountain, there are strange peaks and mountains everywhere, and in the depths of the mountain forest, there is a cave that is more than two zhang high and several zhang deep. The entrance to the cave is blocked by dense trees, which makes people unexpectedly say that under this seemingly ordinary grove, there is actually a cave.

Inside the cave, the shade is as cool as summer, and if you listen carefully, you will find the sound of fine water flowing and the sound of ping-pong chisels. Walking inside, you will see rows of neatly arranged wooden boxes with dead grass inside. The box is not very large, only the size of a food box. Some of the wooden boxes are already sealed, and some are empty.

There are several corners of the cave where there are piles of sulfur, charcoal, and so on. Some men dressed in the same costume were busy in the cave in an orderly manner. Some stood in front of the stone table, weighing something with a rod scale. Some of them slowly mix the things that are good in front of them, and the movements are careful......

These people have been in the cave for a long time. Because their guards did not let them out of the cave, they had not walked out of the cave and seen the bright sun for a long time. Because they hadn't seen the sun for a long time, each of them was much whiter than before. The complexion of the face is weak and white.

They don't know how many days and nights they spent in the cave. Every day, they tinkered and studied things like plant ash, sulfur, and saltpeter. At first, it wasn't clear to them what these things were for. It wasn't until one day that the prince came to the cave in person that they knew what they were doing when they were selected to come to the cave.

The reason why they are locked up here is because their crown prince has found out from nowhere. What to say is mainly saltpeter and sulfur, supplemented by plant ash. Mix these three things together to create a weapon they've never seen before. As long as they have it, they can dominate the world and unify the three kingdoms......

In another part of Mandie, there are two simple wooden houses. In front of the wooden house, there is a dilapidated fence yard. Under a tree in the courtyard, a man in dark clothes held an envelope in his hand, holding his head in one hand, thinking quietly.

"What are you thinking?" a woman's voice sounded behind him.

When the man heard this, he turned his head sideways, smiled at the woman, and raised the letter in his hand: "Ah Li has a letter!"

The woman approached the man, stopped behind him, put her hands on his shoulders naturally, and slowly kneaded: "What did the prince say in the letter? I see that you look a little strange." ”

"See for yourself!" Liao Tianji gave the letter to the person behind him.

Zhang Ni Ni took the ...... Slowly, she frowned, and whispered in her mouth: "Nitrate to yin, sulfur to yang, the two gods of yin and yang meet in a seamless place, and their appearance is also, the characters are stunned, and the soul is scattered and frightened." ”

Zhang Ni Ni was stunned: "Heavenly machine, this ...... Is this the thing we're going to destroy?"

"Yes!" Liao Tianji nodded heavily. He rubbed his eyebrows and sighed, this letter is not Ah Li's handwriting. He thought that the person who wrote should be Bai Qiushui. Whoever wrote the letter, the most important thing was that they couldn't let the people of the Nordic countries transport the gunpowder out of the Wandi Mountains. One night a few days ago, he and Yan Cheng lurked near the cave. It's hard to imagine the power of gunpowder if you hadn't seen it with your own eyes. It's just a thing of the same shape and size as a ball, and it's still black, and it has so much power. He saw that the other party threw it with force, and when the thing fell to the ground, it exploded instantly. A stone was blown up in all directions, and if this thing was really used on the battlefield and thrown into the soldiers, it would be killed and injured countless times in an instant.