Zhao Dagui uses this method to divide the arc into equal parts, obtain less than one ten-millionth of the radian, straighten it out, and after a simple mathematical formula conversion, you can obtain a size reference with an accuracy of less than one-ten-million:

Although it is not necessarily a normal decimal reference, as long as the accuracy is small enough, it can be converted to a size with very high relative accuracy.

Originally, because the main god space is an absolute ideal space with no errors, Zhao Dagui can use the compass to divide the circle infinitely, and it is only idle to reach the accuracy of one ten-billionth of a meter or one hundred-billionths of a meter, but this size is precise to a certain extent, and Zhao Dagui has a feeling of exhaustion, understanding that his spiritual cultivation is insufficient, and he cannot support higher-precision exploration.

Zhao Dagui looked up at the sky in the space, and saw a round of blood yang hanging high, with many relatively dark dots on it, there were thousands of them, which were the blood nerve true qi seeds in the blood sea acupoint.

As soon as Zhao Dagui's mind moved, a true qi seed turned into a red light, and then it fell from the blood yang and fell onto the Zhao Dagui Divine Soul in the main god space, and then the originally somewhat sluggish Zhao Dagui Divine Soul recovered at a speed visible by rubbing his eyes.

The monks pay attention to "refining and refining qi, refining qi and transforming gods", that is to say, you can nourish the soul with true qi, and Zhao Dagui's above method is to restore the seeds of true qi into pure true qi, and then use it to supplement the consumption of the soul.

Zhao Dagui's current cultivation is at the level of the first-order "refining and refining qi", and the true qi can be used to slightly supplement the consumption of the divine soul, but it is very different from the situation where the true qi is continuously transformed into the divine yuan force after the opening of the sea of knowledge, but at least it can slightly replenish and nourish the divine soul and improve the speed of the divine soul's recovery.

The higher the precision of the spiritual gold controlled, the more spiritual power is consumed, Zhao Dagui's previous true qi cultivation has not reached a certain level, and he can't nourish his divine soul with true qi, so he doesn't dare to rashly take this step of delimiting the size, otherwise if he fiddles with high-precision objects a little, the divine soul will languid for dozens of days, and he can't do anything else.

It wasn't until he opened up the Blood Sea Aperture in Leizhou that his true qi became extremely strong, and his ability to nourish his divine soul increased by tens or hundreds of times, that Zhao Dagui dared to operate like this now.

Zhao Dagui rested in the main god space for a while, the blood yang formed by the sea of blood in the sky slowly moved, and one after another true qi seeds turned into true qi and fell to Zhao Dagui's divine soul, this is the beginning of the so-called "refining qi and transforming gods";

When the sea of knowledge is truly opened, the ability to "refine qi and transform gods" will be greatly improved again, and even refine the yin god, and then some incredible supernatural powers can be used.

After resting for a while, Zhao Dagui finally recovered, and decided to continue his work and correct the error of the size obtained before--- the main god space is an absolute space, but there is an error in the brass ruler, and this error must be transmitted to the current one-ten-millionth of the precise size.

Zhao Dagui now obtains a size of one ten-millionth, and by comparing it with other references, you can obtain a millionths of a meter size, although it seems that the accuracy has decreased, but the error will be greatly reduced, and it is more accurate overall.

Zhao Dagui had printed the parts of the "Spiral Micrometer" before, so he assembled them in the main god space, and transformed a "spiral micrometer" made of spiritual gold in the main god space.

After that, there is a lot of tedious repetitive operation, using the "spiral micrometer" to continuously measure, with reference to the cube formed before, to measure the distance of 0.01 mm, and then mark the "absolute linear ruler" to obtain a ruler accurate to 0.01 mm.

It is a tedious task to compare the size of the "absolute circle" and correct the error and accuracy.

The principle of spiral micrometer is similar to that of vernier calipers and micrometers, both of which are circular handles that rotate at a certain angle, and then push the screw forward a very small distance, and then compare the ratio of the diameter of the handle and the screw, combined with the angle of rotation, a very small distance can be measured.

However, the accuracy of the spiral micrometer purchased by Zhao Dagui can only reach the level of 0.01 mm, which is a little lower;

After Zhao Dagui enlarged the diameter of the handle, the dimensional accuracy could continue to rise, and if the mental power was sufficient, it could even be increased to almost infinity, at least the nano-level control was easy to do.

However, just like just now, the improvement of accuracy is also limited by mental power, and Zhao Dagui's mental power also supports controlling the size to the level of one thousandth of a millimeter, that is, the micron level.

Then, by comparing the size obtained with the spiral micrometer with the size obtained by dividing the circle, and by repeating the operation, the error can be eliminated to the greatest extent and a precise size with a very small error can be obtained.

Zhao Dagui made repeated comparisons and calculations to finally obtain an accurate micron-level distance before he could be counted.

With his current mental strength, he can only do this.

The next thing is much easier, mark this dimension to the original one-meter-long Lingjin ruler, and after correction, there are immediately countless more tick marks and size numbers on it, densely packed, marked to a distance of one thousandth of a millimeter.

This is also something that can be done in the main god space, in the real world, it is impossible to mark a ruler with all micron-level dimensions.

With this micron-level one-meter ruler as a reference, at least in the main god space, Zhao Dagui can control the accuracy of the object transformed into spiritual gold to the micron level (longer than one meter as long as it continues to be extended and marked);

In addition, the curvature angle of the object can be controlled below one millionth of a degree.

The advantage of this is that in the future, when Zhao Dagui "embodies" the object in the main god space, he will be able to control the dimensional accuracy of the object at the micron level, which is much higher than before.

Don't underestimate this, this is equivalent to Zhao Dagui indirectly obtaining a magical power, which can use spirit gold to make various parts with a precision of microns in the main god space;

When these parts are assembled in the real world, they can lead to a large number of precision instruments with outrageous precision--- which is terrifying, at least in terms of the technological capabilities of the current era.

Zhao Dagui's current "manifestation" ability, the strength has not changed from before, that is, it is much more sophisticated, which has an academic name in the high-dimensional world, that is, "micron-level size control", which is the basic ability necessary for many high-level civilized engineers, and can be used with special materials to make parts with a dimensional accuracy of microns.

For some, this is a very rubbish supernatural ability, but for a master who can use this ability correctly, it is a thousand-dollar ability.

If martial arts cheats such as "Blood Nerve" and "Sword Technique to Warward Off Evil Spirits" are tactical abilities that improve one's combat effectiveness, "micron-level size control" is a strategic ability that is used to improve the industrial processing progress of the entire civilization.

Zhao Dagui is now a huge rich man in Shanghai, and it is more suitable to use this kind of supernatural power that can increase the development speed of the entire industrial system than to obtain various systems, speed up martial arts cultivation, modify physical attributes, and make the swinging sword more powerful.

It can be said that after the age of steam, this kind of strategic ability is far more important than pure tactical ability, that is, you are the best in the world in martial arts, and you are also afraid of guns.

After using this ability, it was very draining, and Zhao Dagui rested for a while, and his soul slowly recovered under the effect of the bloody sun.