The material was rudimentary, and Ruan Tang had to try to use the drainage method, which used the nature of oxygen to collect oxygen that is not easily soluble in water.

If this method is successful, the oxygen collected is of high purity.

She first filled the bamboo tube with water, then covered it with a smooth piece of porcelain, then quickly turned it upside down into the water, and then pulled the piece off.

Then put a hollow straw into the inverted bamboo tube, and then blow air on the end of the straw outside to accelerate the drainage of the upside-down bamboo tube.

After the water is completely drained, cover the mouth of the bamboo cylinder with a porcelain piece and take it out of the water.

Ruan Tang tried one first, and after all the above operations were completed, she asked Chu Mu to hold a burning wooden stick and slowly approach the mouth of the bamboo tube, and she gently moved the porcelain piece.

The originally faint flame, the moment it moved away close to the porcelain piece, the flame instantly became larger.

Ruan Tang was overjoyed.

"It worked!"

She re-covered the porcelain tiles, then wrapped them in a cloth and tied them with string.

Chu Mu watched it for a long time and didn't understand Ruan Tang's series of operations.

Obviously there was nothing in the bamboo tube, why did she say it succeeded?

"What kind of anger are you talking about?" Chu Mu couldn't help but lean closer to Ruan Tang and asked curiously.

"Oxygen, we can live now, relying on oxygen, if this oxygen is gone, people will not be able to live."

Chu Mu frowned, still not understanding.

"You say that's what we live by this...... Oxygen, where? Why can't this king see it? ”

Ruan Tang smiled: "Oxygen is invisible. ”

But she brought the tube of oxygen she had just made to him.

Then he motioned for him to come closer, removed the porcelain piece, and brought the mouth of the bamboo tube under his nose.

"You take a deep breath."

Chu Mu did so, and indeed smelled a fragrant, sweet smell from inside, faint, almost inaudible.

But after taking a sip, I feel refreshed.

"You may not feel very big now, but if you go up the mountain and feel dizzy, take a bite, it's absolutely comfortable."

Although Chu Mu didn't know if this was the case, he felt new when he heard Ruan Tang say it.

"How do you understand these things?"

"I was a top student when I was studying, so I naturally understood." Ruan Tang said as he tinkered.

"Xueba?"

Ruan Tang was stunned, the word 'Xueba' was a popular saying in her time.

"Oh, that's someone who is a great learner."

"So you're the most learned in your Jing'an Hou Mansion?" Chu Mu continued to ask.

He didn't know much about her past.

I went to check on her before, but I only checked it out.

He didn't know anything about her, but now he suddenly wanted to hear from her.

"Is it just that all the teachers in your house teach such a novel thing?"

It's the first time he's seen anything like this to make oxygen.

Haven't you heard any master teach these things?

Most of these women are women's training, as well as ancient poems and the like.

Ruan Tang said dumbly, where was she taught by the master in the Jing'an Hou Mansion?

That is the knowledge of thousands of years later, and the master of the Jing'an Hou Mansion can't teach this.

"I didn't learn these from the masters in the house, I learned them from some masters who have been wandering outside for many years."

Ruan Tang just found a reason casually, thinking not to let him doubt her origin.

But after Chu Mu heard this, his face was a little solemn.

At first, Ruan Tang was still immersed in making oxygen and didn't notice it.

I just didn't see him open my mouth for a long time, and I couldn't help but look up at him.

Seeing him frowning at himself, there were some emotions in his eyes that she couldn't understand, as if he was distressed and annoyed.

I couldn't help but ask, "Your Highness, what's wrong with you?" ”

"Have you suffered a lot outside all these years?"

"It's fine."

When she came to this world, the first year was really sad, because that year, she didn't have enough food and clothing.

Later, I went to a restaurant and begged the boss for a long time, and the boss was willing to take her in the back kitchen to make a fire.

It's just that there is no salary, and it is just food and shelter.

Later, she worked there for a few months, and gave the boss a few tips to attract customers, and the boss made money, and when he was happy, he began to pay her salary.

Slowly, she saved some money, quit her job, and started her own business.

In the beginning, it was a small business on the streets.

However, she combined some modern marketing strategies, and the business did very well, and slowly, as she made more money, she opened a small store, and then a large store.

Coming through it step by step, except for some hardships at the beginning, the back was actually quite smooth.

went back to Beijing, and after provoking him, he suffered the most.

Ruan Tang thought of this, and looked at Chu Mu's eyes with a little resentment.

But she quickly let go of her emotions and continued to tinker with her things.

Now she has no way to leave him, and when the agreement between the two expires, she can leave, and there is no need to turn over any old accounts with him at this time, lest he be unhappy, and he will have to toss himself again.

Chu Mu naturally discovered her abnormality.

He could see clearly her eyes from the beginning to the indignation, and then to the indifference now.

"What's wrong with you? Is there something unhappy in mind? ”

When a girl is wandering outside, she will definitely suffer a lot and encounter a lot of difficulties.

How did she get through it? How do you protect yourself so well?

All of a sudden, he wanted to know.

It's just that Ruan Tang shook his head, and he didn't have the desire to continue.

After that, no matter how Chu Mu asked, she kept silent.

Rao is Chu Mu couldn't help the temperament that he had been suppressing, and returned to the room with a calm face.

Ruan Tang continued to tinker with her things in the yard, but her mind was a little irritable in the back, and she was distracted several times, and the oxygen that had just been collected was kicked down by her, and several were wasted.

But she later stabilized her mind, did a dozen or so, and made sure that it was almost there, before packing up and going back to the room to rest.

Originally, she lived in a room with Chu Mu, but somehow, she suddenly didn't want to live with him tonight, so she went to the store and opened another room, and went to sleep by herself.

And Chu Mu, who was sulking when he went back to the room, waited for a long time and didn't see Ruan Tang return to the room, so he couldn't help but come out to look for her.

But after looking around in the backyard of the inn, he didn't see anyone, just when he was in a hurry and was about to gather people to go out to find someone.

The shopkeeper of the inn saw him, "Young Master Chu, what's wrong?" Are you looking for Mrs. Chu? ”

Chu Mu and Ruan Tang are living in a wing room these days, and the shopkeeper of the inn thinks that the two are husband and wife, so he has always called Mrs. Ruan Tang Chu.

At first, Ruan Tang wanted to correct him, but was stopped by Chu Mu, saying that they should not attract attention on this trip, and they could save a lot of trouble by pretending to be husband and wife.

Ruan Tang felt that he was, but he couldn't resist him.

In the end, I didn't bother to explain.

Left and right are just one name.

"Well, have you seen her?"

"I saw it, I just saw it."

"Where?"

"Mrs. Zun just asked me to open another side room, presumably I should be resting in the side room at this moment."

When Chu Mu heard this, his face sank again.