"Really?" Xing'er jumped up excitedly.

"Well, but you can learn what I teach you first. Wuya, please help me take out that abacus!" Chen Xu ordered this free thug, bodyguard and errands.

Yu Wuya quickly took out a handful of wooden abacus from the room. Chen Xu took it and shook it a few times, then quickly tweaked it with his fingers, and the abacus beads made a crisp sound.

This abacus is only more than one foot long. It was specially made by Chen Xu's carpenters in the town. The workmanship is very fine. The frame is made of very dry sandalwood. The abacus beads are also hand-carved one by one and then carefully polished. The size looks very uniform. The gear lever in the middle is made of bronze. The wood beads are very smooth to tick. In addition, each gear lever on the middle frame is also engraved with tens of millions of official script fonts. Whether it is appearance, style, or craftsmanship, it is almost the same as the abacus that has been over two thousand years later.

"Xing'er, this is called abacus. Now I will teach you what to use?" Chen Xu put the abacus on the dining table, hugged Xing'er and began to teach her the addition formula of one, one, two, and two.

"My benefactor, the thing you made is simply amazing. I didn't expect that a small abacus would solve the addition and subtraction operation. How many incredible things were recorded in the work that day? It's a pity that Wuya has no chance to see him!" Yu Wuya stood beside him and admired, with regret on his face.

There was nothing to say all night, Chen Xu got up early the next day. After washing his face and brushing his teeth, he took advantage of the time when Chen Jiang and Xing'er made breakfast to cut a few big bamboos, and sent them to break the bamboo strips and scrape them up. Then he used a bamboo knife to wash them into bunches of bamboo wires. After dinner, he was busy for more than an hour. At this time, the sun was already high, and some villagers came over with hoes and vine baskets in groups of three or three, waiting for Chen Xu to lead them to collect medicinal materials.

In fact, the villagers basically know these medicinal materials, but this thing is used to treat diseases. The entrance is about life, so Chen Xu dare not be too careless.

After all, there are quite a few people who have been poisoned to death in later generations after taking the wrong medicine.

For example, the medicinal materials such as Platycodon are 80% similar to ginseng. If they are all dried rhizomes, they cannot be separated by mixing them together, unless they are particularly familiar with the two medicinal materials.

There is also a plant called Shanglu, which is poisonous. In later generations, people can't tell the difference between digging it back and stewing chicken, and then the whole family was poisoned and was admitted to the intensive care unit of the hospital. If it was in this era, it would undoubtedly die.

As for isatis root, there are more similar things. The most common ones are white striata and dandelions. These three wild vegetables are everywhere, and many of them grow directly together. After digging them out, dried and slice them, the gods will make mistakes.

So for a whole morning, Chen Xu carefully taught the villagers to collect medicinal materials by the nearby mountains, forests and ditches, and also talked about the drying of medicinal materials.

The reason is roughly because Chen Xu didn't know the treatment and preparation methods of these medicinal materials. According to the theory of later traditional Chinese medicine, many medicinal materials had to be steamed, some had to be fried, some had to be honey, and some were poisonous. They needed to be considered very carefully when used as medicine, but Chen Xu didn't know anything about these... He saw his second grandfather doing it when he was a child, but he still looked dark.

It was already afternoon. After a simple lunch, Chen Xu packed up his luggage and Yu Wuya, and Niu Dashi was about to leave.

"Mom, I have taken time with my younger sister to prepare the mosquito net these days. When my uncle goes to the town, I will ask him to take it with me. My younger sister should practice the abacus formulas!"

"Be careful on the way!" Chen Jiang nodded repeatedly.

"Mom and little sister, take care of themselves, go!" Chen Xu turned over and grabbed the horse's belly, and the three of them drove away.
Chapter completed!