During breakfast, Qianxue told Lingyun that the first batch of porcelains that were customized for packaging tea had arrived. "According to Yilang's request, we were looking for the largest porcelain shop in Yangzhou, and the ones we customized were the most famous celadons in Yuejiao. In addition, we also sent people to Xingjiao, Hebei to customize a batch of the most famous white porcelain there. However, Xingjiao is in Hebei, and the white porcelain ordered will take some time to deliver it."

The celadons of Yuejiao in Jiangnan and the white porcelain of Xingjiao in the north are the most famous porcelains of this era. Since Ling Yun positioned the Agave as high-end tea from the beginning, the packaging naturally requires porcelain, and it is also the most famous Yuejiao celadons and Xingjiao white porcelain.

"Well, although celadon is better, many northerners prefer white porcelain. We use white porcelain, which is mainly used to package the agave tea sold to the north." No matter when, regionality is always inevitable. Ling Yun threw a piece of gnashed sheep bone under the table, and Huifeng immediately shook his tail and flew over, picking up the bone and gnawing it.

Gao Mingyue snorted a little disgusted, "Wolves are not well-known. When they grow up, they either backfire their masters or leave by themselves." Huifeng is not a puppy but a little wolf. A few days ago, Gao Yi brought his guards up the mountain to practice riding and shooting. When he came back, he brought Huifeng. They shot and killed the female wolf while hunting, and then found the little wolf cub in the wolf's den. He did not want to raise it when he came back, but planned to throw it to the little dogs in the village to play and train them.

When Ling Yun met and saw it, he liked the little wolf cub. The little wolf was so dull and pitiful, which made him feel like he was as anxious as he first arrived here. Finally, he took the little wolf over, kept it by his side, and fed it with porridge with goat milk. The little wolf cub actually survived tenaciously. He named it Huifeng, and it was only a month old, and it looked like three or four pounds. He even followed Ling Yun's butt to chew bones every day when eating.

"It is said that the dog was also a wolf at first, but later it was gradually tamed into a dog guarding the house. Huifeng was so small that he could always raise it. Even if he was really wild and difficult to tame when he grew up, he would let it go." Ling Yun said with a smile. Gao Mingyue was also his sister-in-law. People say that his sister-in-law's butt was half as much as his brother-in-law, but Gao Mingyue was not a kind master at other times except when he settled the accounts. Until now, this sister-in-law seemed to have some prejudice against Ling Yun. This puzzled him, thinking that the one who first proposed to marry into the Gao family was Gao Mingyue. Ling Yun could only try his best to give in. Who told him to give this to his sister-in-law? He broke a piece of cake, sprinkled some salt on it, ate half of it, and fed the remaining half to the Huifeng under the table. "You can feed it, it's very fun."

"Lady can't raise wild things, and they won't feed dogs during meals." She scooped a spoonful of mutton soup with a spoon, and said with disdain while blowing the heat.

Gao Qianxue was already completely used to the daily bickering between her husband and sister, and said with a smile: "Okay, Mingyue, you are the dignified princess, a real lady, a daughter. Yilang is your brother-in-law, why do you fight every day when you meet, like a child?" The corner of her mouth raised, "At this point, you are not as good as your brother-in-law. Yilang knows that you like arithmetic, but recently he has been troubled to make a good tool for you for arithmetic, saying that when you settle the accounts in the future, you can get twice the result with half the effort. By the way, Yilang, what is the name of the tool you made for Mingyue? Look at my memory, I forgot today that I just said yesterday."

"Abacus!" Ling Yun said with a smile. Although Gao Mingyue is always a bit rude and unreasonable, Ling Yun cannot be aware of her. The best way is not to continue to quarrel with her, but to find a way to change her attitude. He knew that Gao Mingyue liked the most was arithmetic, and he found that in this era there were only calculations but no calculations. It was too troublesome to put hundreds of small wooden sticks all over the floor. Abacus was a good tool for thousands of years, so he didn't believe it. Once the calculation was released, he couldn't even match the little girl.

"Abacus? A plate that knows how to arithmetic?" Gao Mingyue smiled, as if she didn't believe that Ling Yun could make such a good thing.

Ling Yun calculated, picked up the linen cloth and wiped his hands, then turned to Mulan who was standing behind and waiting, "Mulan, bring the abacus I made yesterday."

The abacus is made temporarily and is not too gorgeous, but the abacus itself is not complicated. The real thing is just the formula of abacus. Ling Yun put the abacus on the table, pulled his fingers and pulled it out, and the wooden beads slammed.

"Is this an abacus? Can it greatly improve the calculation speed?" Gao Mingyue didn't believe it.

"I know you are very good at arithmetic. It is said that you are the number one arithmetic master in Gaojiazhuang. Why don't we make a bet, find an account book, let's calculate together, you use your calculation sheet, I use my plate that can do it first, and see who can figure it out first?" Ling Yun said with a smile. Although the popularity of computers and calculators in later generations has gradually eliminated abacus, he had a course in school when he was a child, and he never lost it later. The level of abacus is not as good as those old accountants who play faster than calculators, but the formula is also familiar with the applets, and the beads are not slow. Comparing arithmetic with a girl from Sui Dynasty who still holds more than 200 sticks is really a bit like a strong man bullying children.

Gao Mingyue was obviously very conceited about her arithmetic and didn't believe that Ling Yun could beat her with a new tool. He said without hesitation: "Just compare, but what are you going to bet?"

"Well, what are you betting on?" Ling Yun pinched his chin and smiled. After a moment, he said with a wicked smile: "Or what if you lose, please help me take a month's bath for Huifeng!"

"No!" Gao Mingyue refused without hesitation and asked her to bathe the little gray wolf. How could this be possible? If it weren't for looking at her sister's face, she would have killed the wolf cub with a blow, and she wanted her dignified princess to bathe it.

"Then what did you say you bet on?"

Gao Mingyue gritted her silver teeth and stared at her brother-in-law with a smirk, "You're good to bet. If you can beat me, I'll give you ten thousand yuan. If you lose, I don't want you to give me money, so I'll throw this little wolf cub out of the farm." She knew that Ling Yun's son-in-law had no money, but she deliberately made such a large number of bets, which was obviously trying to drive away the little wolf.

However, Ling Yun agreed without hesitation, and he would definitely win the bet.

When I heard that the second lady and my son-in-law were going to settle the score, Gaojiazhuang suddenly became lively. One trip to ten, ten trip to hundreds, and not long, the front hall was surrounded by people. Gaojiazhuang has always been in a good atmosphere and is usually kind to the servants, especially during this period, Ling Yun taught his family every day and was very popular. One was everyone's favorite second lady, and the other was the new son-in-law who is now very popular. For a moment, everyone was extremely excited and wanted to know who would win and lose in this arithmetic duel.

Gao Qianxue was the referee, while the housekeeper Gao Bo and the accountant Zhang Bo were the vice ruling. Zhang Bo selected a new account book from the accountant for the purpose of the competition. The time limit for a stick of incense is limited, and whoever can calculate the accurate result first will win.

"You're sure to lose!" Before the beginning, Gao Mingyue had a sure win expression.

"Don't be happy too early. Ten thousand yuan is really a lot." After Ling Yun came to the Sui Dynasty, he also had an understanding of the prices. In terms of the most basic rice price, it is now the prosperous era of Kaihuang. In the 18th year of the founding of the Great Sui Dynasty, the world was unified, and the northern rule of the Turks and the southern pacification of the Chen Dynasty was at its peak. Especially in the past few years, the international situation was very good, there were no major wars, only some small border conflicts, and there were no major projects, and no major natural disasters. Therefore, the harvest in several years, the imperial court even built a large number of grain warehouses and stored grain in various places. Even the capital that needed to import grain from the east of the Jianghuai River and other places into Guanzhong was only ten coins.

What is the concept of ten coins for rice? After the founding of the Sui Dynasty, various private coins were cleared during the Southern and Northern Dynasties. The official minus five zhu coins were minus four jin and two liang. This coin was commonly known as good meat, strong currency, and strong purchasing power. The modern one liter of rice weighed 1.25 jin, and a dou ten liter of weight was 12.5 jin, and 6.25 kilograms. However, in the Sui Dynasty, one liter was only about 0.6 liters of modern one.

In terms of conversion, a dou of rice in the Sui Dynasty weighs 3.75 kilograms, while a dou of rice in the Sui Dynasty weighs 16 taels per kilogram, about 42 grams per kilogram, 668.19 grams per kilogram, and a dou of rice in the Sui Dynasty was 5.6 kilograms. By doing this, it is clear that you could buy more than 5 kilograms of rice in the Sui Dynasty for ten cents, and the price per kilogram of rice was 1.78 kilograms, which cost less than two cents per kilogram of rice.

If exchanged according to the rice price of later generations, then a penny is almost worth about two yuan for the soft girl coins of later generations. Of course, in fact, the purchasing power of copper coins in the Sui Dynasty was still higher than that of soft girl coins. After all, the food of the descendants was rich and the price of grain was very high. No matter how cheap the food price in the Sui Dynasty was, it was still not cheap. An ordinary worker's monthly salary was 3,000 yuan, and he could buy a thousand kilograms of rice, while an ordinary person in ancient times could not reach 1,700 yuan.

Ten thousand yuan, this can be said to be a big bet. If it is replaced by rice, it can be killed and buried directly.

"Start!" With the sound of Gao Bo, Ling Yun immediately opened the account book and quickly pulled it out. In order to have a more shocking effect, he directly activated the ability to quickly beat the two hands. Thinking back to the time, Ling Yun used his skill to pull the plate with both hands, and also won the award on behalf of the school participating in the abacus competition, which attracted the admiration of countless female classmates. Now, once he used it, he had an immediate effect. Everyone saw Ling Yun looking at the account book, and then he didn't look at the strange plate full of beads. His hands were pulling on it like a phantom, and a crackling sound kept ringing, full of rhythm.
Chapter completed!