...

"The sword master's realm is not that easy to break through..." Mu Wanqing sighed softly, "Sword Master, Sword Master, Sword Master, after advancing to the sword master's realm, it is enough to open a museum to accept disciples. This is an important watershed, and most sword practitioners cannot cross this threshold."

Ou Chuyang asked in surprise: "Why? Isn't breakthroughs in realm all about accumulation and success? Is there any trick?"

"There is no trick, it depends on accumulation. However, the promotion to a swordsman is not enough to rely on the accumulation of sword energy alone, but also requires insight."

"Insight? What to understand, how to understand?" Ou Chuyang asked afterwards. The sword master was his next target, and he took the opportunity to ask Mu Wanqing clearly.

"You can only understand it, not express it in words. No one can teach you, it depends on your own insights." Mu Wanqing continued to express some of her own experiences, "I have tried it for a long time, but I have no idea. I feel that breaking through the sword master not only requires the accumulation of sword cultivation, but also requires a thorough understanding of the world, life, and the great way of swords. Retreatment is far from enough. You also need to go to more places, experience some things, and accumulate experience."

"It is better to travel thousands of miles than reading thousands of books. What you said makes sense." Ou Chuyang said, "Then I'll go and have a leave of absence from Di Zhenjie and accompany you on a long journey."

Mu Wanqing said: "No hurry, I haven't touched the bottleneck yet, so I'll go into seclusion and practice for a while."

"Okay, I'll make some preparations first."

...

After casting a treasure trove again, Ou Chuyang had an idea. Although the electrolytic water-generating oxygen-enhancing combustion method is simple and effective, the purification effect of Wugang is no longer satisfying him. In the future, if you want to smel the sword material with higher grades, you may be more and more unable to do so. While there is still some free time, you should find a way to find a more significant solution.

Being prepared for danger in times of peace and being prepared is better than being a temporary cram. With this mentality, Ou Chuyang ran to the market in Jinghai City and bought dozens of raw materials for "scientific experiments".

"Boom!" With a loud bang, the entire Meixin Hall and several surrounding houses experienced violent shocks.

Mu Wanqing held her sword in her hand and rushed out of the room. Seeing that the entire yard was covered with thick black smoke, she hurriedly asked, "What's going on!"

"It's okay...I'm working on a new fuel formula..." Ou Chuyang grinned at Mu Wanqing with an innocent face, and two rows of white teeth were exposed on his face that was smoked like black charcoal.

Mu Wanqing burst out laughing, immediately raised her face again, and taught her a lesson: "Studying fuel, I almost blown up the house. Do you think such a dangerous thing is a joke?"

Ou Chuyang rubbed his hands and said apologetically: "I was negligent. I didn't expect the fuel to explode..."

"You are not injured, are you?" Mu Wanqing said as she stepped forward and carefully examined Ou Chuyang's physical condition.

"I'm fine, I'm just startled."

"I said it's okay, it's all turned into black charcoal."

"Ah?" Ou Chuyang hurriedly reached out and touched his head, "Fortunately, his hairstyle is not messy."

...

After Li Fuquan explained repeatedly, Ding Zhuang, who had arrived at the city guarding the city and his neighbors dissipated with fear. However, Ou Chuyang stood alone in the yard, looking at a small tuft of black sand in his hand in his mind.

Just now, he incorporated a new fuel called "Thunder Sulphon Shallow" into the earth's fire source crystal and toner. Thunder Sulphon Shallow is produced in Leiming Gorge, and Thunder Sulphon Shallow is named after the loud thunderous sounds that erupt all year round.

Ou Chuyang knew that during the long-term process of refining elixirs, ancient Chinese alchemists discovered that a mixture of nitrate, sulfur and charcoal could burn and explode, thus giving birth to gunpowder, one of the four great inventions in ancient China.

There are also black gunpowder in this world, and black gunpowder is used to make firecrackers and firecrackers. The power of the explosion just now is definitely much stronger than black gunpowder.

Did he accidentally develop a new type of explosive? Ou Chuyang became interested and continued to test his scientific research results. Of course, he moved the test site to a barren mountain outside the city to avoid accidents.

"boom!"

"Boom!"

"Bang!"

...

After less than a hundred violent combustions or explosions, Ou Chuyang found two molded formulas:

One is: 40% earth fire source crystal, 50% carbon powder, and 10% thundersanthemum can increase the temperature in the furnace by 10% with the help of oxygen. The purity of the black steel melted is increased by another three percentage points, reaching 81%. In this way, the quality of the sword he cast will be greatly improved. Although it is far less than that of the best treasures, it is much better than ordinary treasures.

The other one is even more amazing. Fifty percent of the earth fire source crystal, 20% of the toner powder, and 30% of the thunder and sulfa sand mixed together, and with the help of oxygen, an extremely terrible violent explosion occurred. The entire furnace was blown into pieces all over the sky, shooting everywhere, and several big trees around were shot into sieves.

Looking at the "crater" several feet deep at the explosion site, Ou Chuyang was also secretly shocked: the power of this "explosive" is probably almost catching up with the ******* explosive.

In addition to being ignited and exploded, explosives can also be detonated by violent impacts. Ou Chuyang took out the previously cast Breaking Fist as a container to continue testing. He sealed the mixed explosives into the Breaking Fist and filled them with a little oxygen, and then threw them off the hills.

"Boom!" "Boom!" "Boom!"... The explosion caused a burst of echoes in the valley, and the test was successful! Ou Chuyang was very satisfied with the test results and felt that he was qualified to win the Nobel Prize.

...

With the new fuel formula, the precious treasures produced by Mei Xintang are naturally even more popular. Li Fuquan's orders are enough to keep Ou Chuyang busy until next year.

On that day, Ou Chuyang personally took charge of Meixintang and received major customers from afar.

"Master Mei, my master wants to invite you to make a sword in person so that you can communicate at any time." The person who came dressed up was obviously the butler of a wealthy family.

Although the other party asked Ou Chuyang to cast a treasure for a high price of 200,000 crystals, he refused, "I never provide door-to-door service."

"This requirement is indeed a bit difficult." The housekeeper smiled and said: "But my master has many ideas about this sword, and it needs to be communicated in person to make it clear. If Master Mei is willing to go there in person, my master is willing to pay an extra 100,000 crystal stones."

"Then let's go." Ou Chuyang immediately stood up. Just kidding, the 100,000 crystal stones are worth more than the value of a precious treasure. Such easy-to-make money is a fool.

Ou Chuyang told Mu Wanqing and Li Fuquan a few words, and rode a fast horse out of the city.

The fast horse ran a day, ran 800 miles, and arrived at Jinghai City at sunset. The housekeeper took Ou Chuyang straight to Guanhai Tower, "Master Mei was tired of carriage, my master has prepared a small amount of wine to welcome you."

The Guanhai Tower is built near the sea, with beautiful scenery and elegant environment. It is the most famous restaurant in Jinghai. Ou Chuyang followed the butler into the private room on the third floor.
Chapter completed!