What Gu Jin was holding in his hand was an alchemy book.

Looking at the records of various weapon refining in the book, she felt that this was the same as striking iron in ancient times, except that the open fire was converted into spiritual power.

It's just that Gu Jin doesn't know all the materials recorded above.

Especially in this ring mustard seed space, the materials that are refined need ring stones, and she has never heard of this thing.

"Bang!"

As soon as Gu Jin thought of this mustard stone, the sound of something falling to the ground sounded in the quiet study.

She followed the sound and saw a wooden box that had fallen from the bookshelf to the ground.

The wooden box is the size of a palm, and the body of the box is carved with delicate patterns.

Gu Jin walked over and picked up the wooden box from the ground.

She opened the wooden box, revealing the black and pitted stones inside, which looked like meteorites, and there were six pieces of various sizes.

When he saw these stones, the three big words mustard stone flashed in Gu Jin's mind.

What came to mind was the simplest way to refine mustard space.

It is so simple that it does not need to be refined, and it can be directly refined with spiritual power with bare hands.

It's the ring you get, it's the medium of the mustard space, and it's a little rougher.

The mustard seed space can drip blood to recognize the owner, and can store things, but it cannot enter people, but living animals can enter.

Gu Jin thought about it, this is also a good gift.

Moreover, the way of refining is simple.

She took out two mustard stones from the wooden box and placed them back on the empty shelf.

Although the refining method is simple, Gu Jin still wants to be able to refine it to the point where he can handle it.

Gu Jin put one of the mustard stones on the table, and the other one in her hand floated in the void, and the spiritual power in her hand kept adding to the mustard stone.

The pitted mustard stone is fusing with visible changes with the naked eye.

Gu Jin followed the steps in his mind and slowly refined it.

After the mustard stones were completely fused, the shape of the ring appeared in her mind, and she saw the mustard stones in the void change again.

Until it slowly formed a fuzzy ring shape, and the details were a little rough.

The spiritual power on Gu Jin's hand was added again, polishing and smoothing the surface of the ring.

Soon, a black ring that didn't look too ugly and faintly quaint appeared.

The spiritual power was withdrawn, and the ring fell into the palm of her hand.

Gu Jin stared at the ring that fell into his hand, and then compared the jade ring that An Mingji wore on her index finger.

The two can't be compared, but she's still the best-looking.

She put the refined mustard space ring on the table, picked up the second mustard stone and continued refining.

Refining the two mustard seed space rings, the spiritual power consumed was less than half, and Gu Jin did not have the slightest influence on his hands.

The last ring was refined, and she picked up the ring on the table, walked out of the study with her feet up, and walked towards the stream outside.

Approaching the bank of the stream, she found that Jiang Hanyi, who was immersed in the water, woke up.

The other person may have just woken up, and his body moved slightly first, without obvious struggle.

He may have just woken up and not yet had time to struggle.

Seeing that the other party woke up, Gu Jin quickly stepped into the water and slashed at his neck with his hand.

Jiang Hanyi, who had just been a little conscious, fainted like this.

When the other party slipped into the water, Gu Jin picked up the person and untied the shackles that bound him to the stone.

Using spiritual power to probe the opponent's body, it was found that it had recovered intact, and even achieved the miraculous effect of rebirth, and the body could be said to be very suitable for cultivation.

Gu Jin's eyes showed satisfaction, and he just carried Jiang Hanyi's body with one hand, and disappeared into the stream and space.