"I can't learn it, why?" Jiang Xingchen was a little surprised, the old man was a martial arts idiot, extremely persistent in martial arts, how could he listen to the tone like a retreat.

"Hey!" The old man sighed and said: "This period of practicing Tai Chi with the first snow girl, I still can't change the old problem, it may be a habit formed after decades of practice, it's okay to deliberately control it, but as long as the spirit is relaxed, I will unconsciously run the vitality......!

"Then how did Miss Tang pass this level in the first place, I remember that she has also cultivated for more than twenty years!" Jiang Xingchen asked.

"That's what I asked, but guess what this bastard girl said, she said that she had just had surgery and was so weak that she couldn't function at all...... Therefore, if I also want to practice Tai Chi, I must first abandon my martial arts and dissipate all my vitality!"

The old man cried with a sad face, and said angrily: "You are angry when you say this, let me waste my vitality, it is better to kill me altogether!"

"Flutter!" Jiang Xingchen couldn't hold back, and laughed out loud at that time.

"You're still laughing, aren't you gloating!" The old man glared, reached out and grabbed Jiang Xingchen's collar.

Jiang Xingchen hurriedly changed the topic: "What about Xiao Xiang, how is Xiao Xiang practicing?"

"That girl didn't practice at all, and as soon as the big bee came out of the nest in spring, she ran away!" the old man said depressedly: "I don't even have a companion!"

Jiang Xingchen was speechless, and then he remembered that although the little cat girl was a genius, she was by no means serious about practicing martial arts, and her favorite was those bees.

"Boy, what do you say, give me a clue!" The old man let go of his grip on Jiang Xingchen's hand. Said in a low voice.

"What else can you do, keep practicing! I don't believe you can't hear it. Miss Tang said that it was a joke to abolish your vitality...... You have been practicing martial arts for so many years. I have already told you that Tai Chi has not gone out for ten years, if you take your time, you will always be able to succeed!" Jiang Xingchen could only persuade like this.

"Hey~ It seems that this is the only way! I didn't bother so hard when I activated Yuanquan back then!" the old man sighed again, and his eyes fell on the abacus in Jiang Xingchen's hand.

"Boy, what the hell are you doing?" Before the depression of practicing Tai Chi was revealed, the old man's curiosity came up again.

"Didn't I tell you, something fun!" Jiang Xingchen said with a grin.

"How fun is it? It can't be as difficult as Kong Ming's lock, right?"

"Hehe, it's an artifact, there you have it. The most powerful arithmetic master is not your opponent!" Jiang Xingchen lowered his head and said while busy with the work in his hands.

"What? The most powerful arithmetic master is not an opponent!" the old man blinked and questioned, "You kid is urging cheating, right?"

"Don't believe it?" Jiang Xingchen turned his head to look at the old man, waved his hand and said: "If you don't believe it, forget it, it's not for you anyway! You are an uneducated martial artist, this thing is too high-end for you!"

"You are an uneducated martial artist, my ancestor I am a great doctor, have you ever seen an uneducated great doctor?" the old man retorted angrily, and then asked, "Boy." Is this thing really as bad as you say?"

"Of course, it's quite a cheat!" Jiang Xingchen nodded and said, "But this artifact is not easy to master, you have to learn it for a while!"

"What's that...... Brat. After this artifact is made, let me play with it first!" said the old man with a grin.

"You...... Pull it, you don't believe it!" Jiang Xingchen turned his head.

"Believe, who said I don't believe it. I don't believe it!" the old man grabbed Jiang Xingchen's arm and shook it, Jiang Xingchen shuddered. I got goosebumps.

"It's useless to give it to you, this thing is not easy to learn! It's difficult!" Jiang Xingchen shook off the old man's hand vigorously.

"Ancestor, when have I ever been afraid of difficulties? Since it's an artifact, of course you have to learn it!" The old man patted his chest, completely forgetting how he had flinched before Kong Mingsuo and Taijiquan.

"That's not going to work! this is my gift to Nier!" Jiang Xingchen shook his head flatly.

"Boy, you said it, Tai Chi won't go out for ten years, and then I'm going to go into retreat. Do you know how painful the days of retreat are? I just want to ...... before the retreat."

Before the old man finished speaking, Jiang Xingchen smiled: "Old thing, you don't have to play with me! If you go into retreat, I'm afraid you will run out in two days, I don't know you yet!"

"Boy, you're too bad, I just want to have some fun!" the old man stood up and shouted loudly.

"It's no problem to play with you, but can you promise to study seriously, I can talk about the ugly things in front, if you give up halfway, you won't have a chance in the future!" Jiang Xingchen said lightly.

"Isn't it just learning how to use it, what's so hard ......about it?"

After a (month), the old man opened his mouth and looked at the abacus formed in Jiang Xingchen's hand, looking fooled: "This is the so-called artifact, you can defeat all the arithmetic masters with this?"

"That's right, that's it, how about it, doesn't it look like it?" Jiang Xingchen laughed, shook the abacus in his hand, and made a loud noise.

"Boom, this thing doesn't look like an artifact!" the old man complained wildly in his heart.

"That...... Oh, abacus, doesn't this abacus need to be learned? how to learn it?" asked the old man.

"It's not easy to learn this, if you want to have a smooth time, you can't study hard without ten days and half a month...... Come and I'll teach you!" Jiang Xingchen said, walked to the stone bench under the big tree in the courtyard, and put the abacus on the table!

"Look at it, there are thirteen columns in the abacus, and the beads below, one represents one, and the one above represents five...... One up, two on two, three on three, four on four, down five to four......"

Jiang Xingchen slowly fiddled here, but he didn't notice that the old man's face was dark. One up, two on two, this Nima is a fart artifact, it's just a toy to coax children to play, and I've been deceived by this kid again.

"Remember?" Jiang Xingchen asked, turning his head.

"Remember your size, why are you so coaxing a child! I know that your little soul is not well-intentioned, and you are really fooling me! What about the artifact......" The old man was so angry that he thundered.

Jiang Xingchen was not in a hurry, until the old man's voice fell, then he stood up and smiled coldly: "If you don't learn, forget it! Don't regret it in the future! Speaking of which, I don't want to teach you yet, this is a gift for Nier!"

Jiang Xingchen waved his hand as he spoke, walked out with an abacus, and walked straight out of the courtyard gate.

"Huh, the little soul is not right, is what he said really for learning?" The old man rolled his eyes and ran out with Jiang Xingchen, far behind.

All the way to the research institute, Jiang Xingchen had already found that the old man was following, but he ignored it and went directly to the real room.

Nier is studying Jiang Xingchen's questions, these two questions look simple, but they are difficult to do, and there are conditions, only rulers are allowed, and there can be no scales on the ruler.

"How's it going?, have you figured it out?" Jiang Xingchen patted Mei'er on the shoulder.

"Ah, sir......" Nier woke up, turned her head to look at Jiang Xingchen, and shook her head a little unhappily: "Not yet, these two questions are more difficult than looking!"

"Then take a break and see what I have for you. Jiang Xingchen smiled and raised his hand, holding an abacus on it.

"So fast?" Nell was stunned, not long ago the lord said that he wanted to give a gift, so he brought it.

"Is this a gift for me, what a strange look!Sir, what is this for?" Nell's eyes immediately fixed on the abacus in Jiang Xingchen's hand.

"This is called an abacus, and it has a very good effect on the four operations, and it is very helpful for the calculation of large amounts of calculations!" Jiang Xingchen said.

"Really?" Nell glanced at the abacus with some suspicion, and then asked, "Sir, how is this used?"

"Wait a while, hand over Xian Ning to learn together!" Jiang Xingchen said.

"I'll call. Nier got out of her chair and quickly ran into the real yàn room inside, and pulled Xian Ning out in a moment.

When Xian Ning saw the abacus, she would be suspicious after hearing about the function of the abacus, if it was true, of course it would be good, she had done too much processing of the logarithm jù, and having this tool could just solve the problem. But this abacus looks too inconspicuous, is it really as powerful as Jiang Xingchen said.

Jiang Xingchen knew what she was thinking as soon as he saw Xian Ning's expression, and he didn't explain it at the moment, just asked the two of them to sit down, then took out a piece of paper, and wrote out the formula of the abacus while recalling......

The old man is rampant in the Star Collar, even if he is in the center of the research institute, he can enter and exit at will, and the private soldiers guarding him will not care about him. Quietly followed Jiang Xingchen into the real yàn room, and saw Jiang Xingchen showing Nier an abacus.

"Hmph! still pretend with me, what kind of artifact, it's just a toy to coax children!" When the old man was about to leave angrily, Nier dragged Xian Ning out.

"Huh?" The old man stopped, doubting what he had just thought, if it was really a child's toy, why did he call Xian Ning out, he couldn't play with the toy together.

Therefore, when Jiang Xingchen explained to Nier and Xianning, the old man also listened, and unknowingly came behind Jiang Xingchen.

At the beginning, when he talked about one on one and two on two, the old man still didn't think so. But when it came to the later talk that one return was like one entry, and when he saw that one into ten and two into five were added, the old man's eyes changed. Only then did he realize that this inconspicuous wooden frame and beads were really a calculation artifact, and he could have so many calculation formulas.

Nier and Xian Ning also couldn't hide the shock in their hearts, they didn't expect that a small abacus, dozens of beads can really be done, and there are decimal places.

After a while, Jiang Xingchen put down his pen, turned his head to look at a few people, and asked, "How is it?" (to be continued......