After Jiang Yuheng said goodbye, Xiao'er went to teach Ma to make rose tea again.

Not just rose tea, but rose essential oil!

After Shangguan Xuanyi retrieved the distillation tools, she was going to teach Ma how to refine rose essential oil.

Rose essential oil is called "after essential oil", but two thousand catties of roses can be refined into about one catty of rose essential oil, and ten catties of rose petals can produce a drop of rose essential oil, so rose essential oil can be said to be the most expensive essential oil in the world, more expensive than gold.

But expensive is also valuable, rose essential oil is very beneficial to women: it can lighten spots, whiten the skin, improve skin dryness, restore skin elasticity, not only can beautify the skin, but also nourish the body, for female endocrine disorders, dysmenorrhea, menopausal discomfort and so on have curative effects, but also nourish the uterus, is the most suitable essential oil for women's health.

Twenty-four hours after the roses are picked is the best time to refine essential oils, and the roses that Xiao'er bought from Boss Feng have already passed the best refining time, so she used them for Ma's practice.

Xiao'er runs a beauty salon, this rose essential oil must be used, she has already refined it in the space, and now it's time to cross the road and take it out and sell it!

As long as fresh roses are added with water, the principle of steam distillation is used to distill a floating white oil-water mixture, and the second step is to add sodium chloride (salt) to the oil-water mixture for oil-water separation, and then use a separating funnel to separate the essential oil and water, and then further dehydrate and purify the rose essential oil to obtain pure rose essential oil.

To extract pure rose essential oil, in this backward ancient times, the difficulty is to prepare all the materials and equipment and grasp the temperature.

Fortunately, there is no shortage of materials in Xiao'er's space processing workshop, and it is not impossible to find these materials in real life, and now he only waits for Shangguan Xuanyi to bring things back, and then he begins to teach Ma to refine.

The price of rose essential oil Xiao'er is one tael of gold and half a tael of essential oil, and after hearing this, Ma Shi felt that this is simply crazy! Who buys it so expensive!

Later, she began to refine essential oils, and she used up 5,000 catties of roses, and she didn't refine much (of course, that was also because the roses were not fresh enough), and Ma felt that two taels of gold and one tael of essential oil were also cheap! This fucking busy year and a half has not had a few drops of essential oil, can this oil not be expensive! If she spends all this time digging gold mines, how much gold can she dig out!

Since the beginning of refining essential oils, Ma has started her busy life like a dog. If she was asked to set the price, she would have to have a drop of essential oil in one or two golds!

Of course, that's an afterthought.

……

Leaving the small mansion, Jiang Yuheng was waiting outside the gate of the town, he was waiting for Shangguan Xuanyi to come back.

He wants to return to the imperial capital, whether it is for his dead father and younger brother, or for the sake of the fifth princess, he must return to the imperial capital as soon as possible.

Shangguan Xuanyi came back in the sunset, and when he saw Jiang Yuheng waiting outside the city gate, he knew that he was waiting for him.

The two returned to the small house together and talked about things for a long time in the study.

Jiang Yuheng expressed his desire to return to the imperial capital as soon as possible, but he also knew that now he was no longer the prince of Zhenguo, and whoever recognized him after returning might be beaten to death before he entered the city gate!

Jiang Weiqiang is a scheming person, his body has never been found, maybe he has sent people to guard the city gate for so many years, it is not surprising.

Jiang Yuheng did fall into the water when he fell off the cliff, and then he was directly washed away by the gasping current, and then he was probably washed ashore by the water, and then he was rescued by the husband who went into the mountain to collect firewood.

It can only be said that he should not die!

Shangguan Xuanyi naturally supported Jiang Yuheng to return to the imperial capital as soon as possible, but after Shangguan Xuanyi tried Jiang Yuheng's skills, he changed his mind, his martial arts were too poor, would he go back to find death?

In ten years, the current Zhenguo Mansion has long been Jiang Weiqiang's person inside and out.

And now Jiang Weiqiang is the prince of Zhenguo, Jiang Weien is the prince, and the emperor is the emperor!

Jiang Yuheng couldn't come up with evidence to prove that Jiang Weiqiang did the death of his father and brother ten years ago, and it was impossible for him to return the position of the prince of the town!

After all, this is not child's play, and you can pay it back if you say it's back.

The two discussed, it was impossible to seek justice on the surface, Jiang Yuheng was also worried that the old man would not be able to bear such a blow, the second son killed the eldest son's family, and the grandson turned back to retaliate against the second son, it would not be an old man who wanted to see it, so Jiang Yuheng chose to assassinate, and there were not many relatives left in this world.

Jiang Weiqiang, for his personal desires, actually disregarded the interests of the country and the safety of the soldiers, and set up a bureau to kill his own brothers and nephews.

But ten years have passed, the Xiyue Kingdom has all died, and the damned people are dead, and there is no doubt that if you want to find evidence, you will undoubtedly look for a needle in a haystack.

Shangguan Xuanyi and Jiang Yuheng grew up together since childhood, so they naturally believed in him and were willing to help him.

revenge, Jiang Yuheng wants to avenge himself, then he can only practice martial arts, and then find an opportunity to assassinate.

In the long river of time, everyone is sailing against the current, and if they don't advance, they will retreat.

Although he would do a set of boxing exercises every morning, his martial arts skills were not as good as they were ten years ago, but Jiang Weiqiang and Jiang Weien were constantly making progress and growing in power.

Jiang Yuheng wanted to kill them now, it was impossible.

Shangguan Xuanyi decided to arrange for Jiang Yuheng to join his own personal guard, although the hard training there was not as difficult as the secret guard, but the training was also very strong.

So Jiang Yuheng became a personal guard of Rui Wangfu under the name of Liang Dali.

Shangguan Xuanyi gave him a token and asked Zhao Yong to take him to report for duty tomorrow.

Shangguan Xuanyi's personal guard training camp was not in the imperial capital, but in a place with dangerous terrain, and no one else knew about it except his personal guards and himself.

The two discussed many things, and it was not until the middle of the moon that Jiang Yuheng said goodbye and left.

Shangguan Xuanyi returned to the room, and Xiao'er was studying several sets of comparative success data for drying roses today.

The amount of firewood, the heat, the time, how many dried flowers can be obtained from a pound of flowers, etc., she registered them and calculated an average value.

In the future, if you follow this average, you will not go wrong.

Shangguan Xuanyi bent down and hugged Xiao'er directly from behind, and pillowed his head on her fragrant shoulder: "Are you done?"

"I'm done, I'm not tired. Xiao'er's energy is better, even if she is standing in the flower tea that has been baked for a day, she does not feel tired.