(Thanks: the "Peach Blossom Fan" sent by Haijiao Wangtian Cliff, and the "Peace Charm" sent by the leisurely afternoon tea.) Pen & Fun & Pavilion www.biquge.info)

Yang Yun feels that the days in Zhoujia Village are always moving slowly and fully, and the acres of vegetable land in the backyard of the Yang family can already be seen, and patches of emerald green belong to the novelty of spring. The wasteland in the backyard planted vegetable seeds until now, after half a month, the vegetable seedlings are growing gratifyingly. In the chicken coop in the front yard of the Yang family, the hens also began to lay eggs, and the thin snow by the river in the field began to freeze, and the footsteps of spring were already quietly approaching the earth.

It is the arrival of the spring ploughing season again, the spring ploughing is one inch deep, you can top the dung again, the spring ploughing is not busy, and the face is hungry and yellow after the autumn. Such a well-known Yan language, the hard-working farmers have been passed down from generation to generation. Spring ploughing is about to begin, the Yang family and the Li family discussed, and the two families prepared to fertilize the wasteland at the foot of the right mountain half a month in advance.

Spring ploughing generally starts at the end of February or early March, Yang Yun is ready to first sprinkle the fertilizer of the two big pits at the foot of the right mountain in the ground to increase fertilizer, and when the seeds begin to be planted in March, the fertilizer has been absorbed by the land, and the nutrients can be transferred to the plants by planting seeds in the future.

This morning, Uncle Li went to the village to rent cattle from the cultivated land, because the two families ploughed in advance of the spring, there would be no one to rent the cattle, the two families finished breakfast, Yang Xuan went to Dr. Xu's house to learn pharmacological knowledge, and the rest of the people led the cattle and set up a wooden plough to the wasteland at the foot of the right mountain to work.

Uncle Li and Grandpa took turns driving the oxen to plough the twelve acres of wasteland, and the Yang Yun brothers and sisters and Li Dabao were in charge, picking up grass roots and small stones behind the land that Grandpa had ploughed, and cleaning up the debris on the wasteland. Squatting on the ground like this, picking up grass roots and small stones for a morning, Yang Yun felt that her waist was about to break, there were too few farm tools in Zhoujia Village this week, and she could actually use an iron-toothed rake to comb the ground.

The iron-toothed rake can be used to loosen small clods of soil, and can also worry about the weeds and small stones that are ploughed out, so Yang Yun decided to draw an iron-toothed rake when he has free time at night, and take it to the town tomorrow to make two iron-toothed rakes. Otherwise, after picking up the weeds of the twelve acres of wasteland, Yang Yun felt that she would have to lie in bed for half a month. By the way, the last time I said that I wanted to make a four-wheeled cart, I didn't draw a picture to build it, so this time I want to build farm tools, let's play together.

At night, under the light of the oil lamp, Yang Yun took out a pen and paper, and after going to Zhoujia Village for so long, Yang Yun still couldn't use a brush, and the brush used for drawing was too soft, so he couldn't draw the effect he wanted. Yang Yun found a pencil-sized branch and burned it black, which was a simple charcoal pen. During this period of cat winter, Yang Yun worked hard to practice female celebrity and painting skills, and the farm tool drawings drawn this time looked much clearer than those drawn before, at least Yang Yun herself could see what she was drawing.

The next day, Yang Yun took two pictures of farm tools and asked Yang Yong to accompany her to the town to build farm tools, after all, Yang Yun herself was just an eleven-year-old girl, how could she go to the town alone. The brother and sister rushed to the town early in the morning, still looking for the same master Tian who made dried tools for baking bananas last time to make farm tools.

When he arrived at the blacksmith shop, Yang Yun took out the two drawings.

"Master Tian, you can build the tools on these two drawings." Yang Yun handed the two drawings to Master Tian to see, and Master Tian took the drawings and looked at them for a while.

"Little girl, this iron-toothed rake is easy, there are ready-made goods in the iron-toothed rake shop, do you want to take a look, this iron-toothed rake is often beaten, you just buy a ready-made one."

"Master Natian took the little girl to have a look." Yang Yun knew that some farmers also made iron-toothed rakes, but what Yang Yun wanted was the kind of one-meter-wide iron-toothed rakes, and maybe the ready-made goods in Master Tian's store could not meet her requirements. Master Tian took Yang Yun's brothers and sisters to see the tools, and sure enough, Yang Yun took a look at it and knew that this ready-made iron-toothed rake was too small to meet her requirements.

"Master Tian, you still want to help the little woman fight again, this ready-made iron-toothed rake is too small, and the little woman wants the kind of three-foot-wide iron-toothed rake."

"A three-foot-wide iron-toothed rake is too big, and it's usually a foot wide."

"The little woman wants a three-foot-wide iron-toothed rake, you see if you can build it, if not, the little woman will find someone else."

"Yes, yes, absolutely can." Master Tian was anxious when he heard that Yang Yun was looking for someone else, how could anyone push the business out, and besides, he could build it himself, but it took some effort.

"What about this four-wheeled cart?" Yang Yun asked about another drawing.

"This is the first time I've seen this cart, and the farmer's cart is all one-wheeled. The four wheels are just like the wooden wheels of the carriage, and it is not difficult to do, but the little girl asked the inner wheel to use an iron ring as the inner axle, and I don't understand it. ”

Yang Yun had to explain the principle of gears to Master Tian in detail and patiently, and drew detailed parts on the paper to Master Tian, and finally talked about it with a dry mouth, and Master Tian finally figured out the principle of gears.

"Wonderful, it's wonderful, the little girl said that such iron gears, if used to assemble large carriages or pull wagons, iron gears can speed up the running speed of the axles and reduce the burden on the wheels, so that the speed of work can be greatly improved." I have to say that Master Tian is a very smart craftsman, as soon as Yang Yun talked about the principle of gears, he thought of assembling iron gears into other large tools.

"Master Tian, then you will do this four-wheeled cart now."

"Yes, absolutely, the little girl's four-wheeled cart needs to add another handle frame, right?"

"Yes, when can you build an iron-toothed rake and a four-wheeled cart."

"In six days, the little girl will come back to get the tools."

"It's going to take so long."

"Although the little girl explained the principle of gears in detail, it may not be very smooth to make, so these wheels need to be pondered again."

"Master Tian, why don't you build the iron-toothed rake for the little woman first, this cultivated land is in urgent need, you can do it later, and how to calculate the price."

"Two tools add up to two taels of silver."

"Master Tian, you are too unkind, if you take this iron gear and help others make other tools, don't say that you can't make money, you can make a lot of money with that pliers last time." As soon as Master Tian heard about Yang Yun and the tongs, his forehead began to sweat again, and Yang Yun felt that this method had been tried and tested.

"Then give the little girl a little cheaper."

"Master Tian, you can help the little woman do these two things for free, the four-wheeled cart just costs some wood and doesn't use much iron, if you want the little woman to give you two pictures, what do you think, think about it, you use this newly designed iron gear to help the rich families in the town install the truck, don't you earn these two taels of silver."

Master Tian looked at Yang Yun's resolute appearance, and knew that if she received her money today, she would definitely not give him the drawings, and if she went to other blacksmithing shops to make this tool, she would lose the opportunity to make money. The iron gear on the drawing just now, some detailed parts have not been seen in detail, and they must refer to the drawings to install step by step. Master Tian thought about it for a while, gritted his teeth with a painful expression on his face, agreed with Yang Yun's opinion, and gave her two tools for free.

Yang Yun took Yang Yong out of the iron shop with a spring breeze, and came to get the iron tooth rake the day after tomorrow, and the four-wheeled cart would not be delivered until six days later. The brother and sister went to the market in the town to buy some meat and went back to Zhoujia Village.