"So the name of this sword should be Twin Souls, not Frost Souls!" Concubine Yan suddenly thought of it.

"Exactly!" Jin Yao nodded.

"Two souls?" The Ice White God Kill understood, no wonder he was injured, precisely because these were two swords, not one.

"So could it be that General Qin Kai was originally named Twin Souls, but was called wrong by later generations?" The Snow Maiden is curious.

Everyone pondered, and it seemed that this was really possible.

"It's not impossible, the reason why I guessed that it was Chengying was because Yan Chunjun said that this sword was obtained by General Qin Kai in the Lonely Bamboo Country." Jin Yao said and explained the origin of the Chengying Sword.

"The three swords of Chengying, Hanguang, and Xiaolian are known as the three swords of Kong Zhou, but in fact they have another name." Jin Yao looked at everyone and said.

"King Yin's Three Swords?" Concubine Yan is relatively knowledgeable, and as soon as Jin Yao reminds her, she can answer quickly.

"Yes, the origin of Chengying, Hanguang, and Xiaolian is very mysterious, I only know that they were originally the three swords of King Yin, but since the fall of Yin Shang, the three swords have not ended, and later Hanguang was found by Kong Zhou, but then disappeared again. It wasn't until recent years that I learned that Hanguang was in the Nameless hands of the Juggernaut, and the other two swords were nowhere to be found." Jin Yao said with a smile.

"The lord of the Lone Bamboo Country is originally a descendant of Yin Shang, and he is also a descendant of the Yin Shang royal family, with a surname of the son, and he was ordered by the King of Shang to guard the north, so I guess that there is a sword in the frost soul, either Chengying or Xiaolian." Jin Yao voiced his guess.

"Then why can't it be a night practice?" The red-haired god asked suspiciously.

"With a lightsaber, you can't see it, you don't know it; What it touches is also boundless, passing through things and not realizing things

Chengying Sword, will be a cool friend, when the sun and evening are dusk, the north and observe it, if there is a thing, I don't know its state. What it touches is also whispering, and things are not sick.

Practicing the sword at night, Fang Tian sees the shadow but does not see the light, and Fang Ye sees the light but does not see the form. Its touch is also, however, it passes with it, and it feels sick without blood." Concubine Yan helped explain the origin and record of the three swords.

"What do you mean?" The red-haired god killer was even more puzzled.

"So let you read more!" Jin Yao was speechless.

"It means that when the shadow is dark, there is a faint presence of objects, but the shape cannot be distinguished; The blade of the sword passed over and only made a slight sound, stabbing through the body without feeling the pain.

And when the sword is practiced at night, its light cannot be seen during the day, and its shadow cannot be seen at night; Wherever it touched, only the cold light flashed, and the blade of the sword passed, and although the sword recipient felt pain, the wound healed immediately, and the blood did not touch the sword." Concubine Yan continued to explain.

"So, this is the reason why Bing Bai will be cut by the sword, and when we see the frost soul, it happens to be when the light is dim, and we can vaguely see the shadow of a dragon wandering away on the sword, so I confirmed that it is Chengying." Jin Yao added an explanation.

"Of course, the most important thing is that the origin of the name of the Chengying Sword, at the turn of summer and autumn, at sunset, it appears in its form, but does not see its form, touches it, passes by the thing and does not notice it. Jiao divides the shadow, and the goose forgets to return, hence the name Chengying." Jin Yao continued to popularize science to everyone.

"Ding~" Then with a faint sword groan, Jin Yao was instantly dumbfounded, looking at everyone in confusion.

"Don't tell me, you let Seungei fall to the ground!" Concubine Yan, Snow Girl and others all had a sense of foreboding.

"Can I say, yes?" Jin Yao lowered his head and opened his eyes wide to look for it, but Chengying was already invisible and invisible, and it was even more difficult to find it if he didn't move.

As for touching it slowly, don't be stupid, try it if you're not afraid of death, you can't feel it at all when you are injured by the Chengying Sword, and you don't know that you were cut until you bleed.

The corners of everyone's mouths twitched, okay, what are you doing with it pulling it out of the frost soul, you should hold it well when it is withdrawn!

"Chengying is better than Hanguang and Xiaolian, so there can be a little shadow, everyone be careful to find it!" Jin Yao could only lie on the ground in embarrassment, carefully looking for it by candlelight according to the place where the sword chant had just come out.

"......" Everyone was speechless, so they could only follow him to lie on the floor of the backyard and stick to the ground, and use the candlelight to see the famous shadows.

"There is no shadow and no shadow, you are sure

When it falls to the ground, it's still in the shape of a sword?" Almost looked at the floor, and everyone didn't see the slightest shadow, Concubine Yan looked at Jin Yao in a daze.

The Chengying Sword also appeared for the first time, and they didn't know its specific form at all, but according to ancient records, this sword didn't even seem to have a fixed form, only a sword shadow and no sword shape.

Jin Yao was also dumbfounded, as if it was really like that.

Everyone stood up and looked at Jin Yao in a daze, if there was no form, then how could they look for the shadow!

"You forced me!" Jin Yao looked at the empty courtyard, and even Ling Xuan and Mo Mei couldn't sense Chengying's location, obviously Chengying was teasing them.

"What can you do?" The God Slayer swordsmen are all speechless, good Chengying, you don't hold it tightly, and you let it fall to the ground, no wonder Juzi said that you are a three-loser thing.

"Wait, don't let people in, be careful, don't let it run!" Jin Yao returned the frost soul to the Snow Maiden and explained, "If it wants to run, it will definitely appear, and the frost soul will be able to sense it."

The Snow Maiden nodded, took the Frost Spirit, and sensed it carefully, while the Slayer Swordsmen looked around, not allowing anyone to enter the courtyard.

"Where are you going?" Concubine Yan and the others looked at Jin Yao who was walking out suspiciously and asked.

"Since it's called Chengying, then I'll go get a shadowless lamp and see how it Chengying!" Jin Yao said confidently, it's easy to do with a shadow, I'll go get a shadowless lamp and shine it on the ground, I'll see how you can hide!

"Shadowless Lamp?" Everyone wondered, what was that.

Jin Yao didn't explain either, the structure of the shadowless lamp is actually very simple, it is a multi-angle combination of different light sources to ensure that there is no dead angle at 360 degrees, and there is no shadow blocked by objects.

However, there are no halogen lamps and LED lamps as light sources in this era, and if you replace them with night pearls, the light of night pearls is not enough, so Jin Yao chose to set up candles on the walls around the entire courtyard, and use copper mirrors to gather light sources at the back, as long as a searchlight is an angle, all copper mirrors are also deflected to ensure that there are no dead angles in 360 degrees.

"Really?" Everyone hesitantly withdrew from the courtyard, watching Jin Yao turn the bronze mirror and explore the brightly lit courtyard.

Jin Yao didn't speak, just carefully turned the bronze mirror in his hand, and searched a little bit, although the courtyard was already transparent, but he still looked carefully, trying to find that trace of shadow.

"Found it!" When everyone was about to fall asleep, a joyful voice sounded, and everyone immediately came to their senses again.