Duan Xing and the others followed the old woman's instructions and walked about two or three miles to Mangrove Slope, at this time, Duan Xing stopped and said to Xie Yong: "Old Xie, when you see Master Sun in a while, you must be polite, accept your temper, and don't get angry, so as not to frighten the old family." Xie Yong was not happy when he heard this, and was about to argue, saying, "You don't need the adults to go in person, I'll just arrest the old man." When Duan Xing saw it, his face sank, and he said: "If you don't know how to restrain yourself, just stay here and wait, lest you go to ruin the reputation of this hundred households when the time comes!" Xie Yong listened, promised not to be rude anymore, and everyone walked towards the mountain together.

The group walked not far away, and saw two figures shaking in the distance, "Master Sun! The young soldier named Xiao Ye and the villager who led the way shouted together, and ran over while shouting, and after a while, Duan Xing saw the two of them leading an old man and a young man, slowly walking towards him.

When he got closer, the soldier named Xiao Ye introduced to Duan Xing: "This is Master Sun." He pointed to Duan Xing and introduced to the old man: "Master Sun, this is our Lord Duan of the Hundred Households. As soon as these words came out, the old man was taken aback, and hurriedly stepped forward to kneel on the ground, saying: "The old man has seen a hundred households. Duan Xing took a closer look at the old man, and saw that he was about sixty years old, and although his clothes were a little ragged, he was in good spirits and had a ruddy complexion, and he looked like an extraordinary person. Duan Xing was not polite, and asked directly: "You are Master Sun, I heard that you are the best potter of this generation?" The old man hurriedly replied, "Exactly." ”

"Then I wonder if you can dig the kiln needed to burn pottery?" Duan Xing asked again.

"This one will. The old man replied. "I wonder what utensils you need to fire?" "Don't ask, just grab the guy and let me go." Although Master Sun had doubts, he didn't dare to ask, so he only got the Erniu family to pack up all the guys, and took the two apprentices to Xingyi Fort with Duan Xing and his party.

When I arrived at Xingyi Fort, it was already afternoon, and the fort had already hired a carpenter to make a mold. At this time, Duan Xing took out the cement formula he had written from memory, and said to the old grandson: "Master Sun, this piece of paper records a material used to build a house, this material is abnormally hard, and the room built with it is invulnerable, and I have written all the raw materials on it, please take a look." Lao Sun Tou took a closer look, the raw materials listed above are sand, stones, clay and other substances, the preparation method is: add water in proportion and mix it well, then add gypsum, and then heat it and pour it into the mold.

After reading this recipe, Old Sun Tou expressed his doubts to Duan Xing, he didn't believe that such a sturdy thing could be made so easily, and asked Duan Xing, "Can this work?" Duan Xing said: "You can always try it." The old grandson didn't say much, agreed, and then took two apprentices to dig a kiln and burn stones. Duan Xing also sent several family members of the soldiers in the fort to assist in carrying the materials.

When the required materials are ready, under the organization of Lao Sun Tou and Duan Xing, the soldiers and apprentices go to crush, calcine, heat, stir and other processes respectively, and finally pour the prepared clinker into the prepared mold. After a while, after the clinker had condensed and cooled, Duan Xing asked the apprentices to carefully remove the molds and take out the bricks one by one.

Duan Xing saw that the bricks had been made, so he picked up a brick and checked it, found another green brick, compared it with each other, put two different bricks on a stone platform, and placed an iron hammer, and then announced to the people below: "Now there are two bricks here, who is willing to come up and use this iron hammer to smash these two bricks separately, and see what difference the result is." As soon as the words fell, a strong man with five big and three thick feet walked out of the crowd, walked to the front of the stage and said angrily to Duan Xingweng: "My lord, I am willing to try." As soon as he spoke, he stepped onto the stage, took the hammer and smashed it into the green brick first. I only heard the sound of "whew", and the green bricks broke into two pieces in response. The strong man swung the hammer heavily to the prepared cement brick, and the result was unexpected, after the cement brick suffered this heavy hammer, it turned out to be intact, the strong man saw it, thought that he was dazzled, and he was busy smashing it with a hammer, but the cement brick was still intact, and everyone in the audience was stunned and exclaimed.