Chapter 501 Lao Hei will also upgrade (seventh update, please vote for me)

It was not until dark that everyone returned to the house.

Chen Zhao did not let Cheryl and Yula jump into the lake to take a bath again. If they were allowed to go into the lake again, they would probably play until it was dark again.

Let them clean themselves up in the pool first, and then go back to the house.

Although there is a swimming pool at home, Chen Zhao and Fali rarely use it.

When Chen Zhao and Fali play in the water, they usually go to the lake.

They also like the feeling of being in the lake, and the pool is mostly used by the family pets to play in.

Of course, the water is also changed every day.

But when Yura and Cheryl came back, it was Cheryl who helped Yura back.

Chen Zhao frowned and pulled Yura to his side: "Yura, what's wrong with you?"

"It's nothing, I just feel a little tired."

Chen Zhao took out his stethoscope and checked Yura's body.

The medicine Chen Zhao gave to Yura last time increased Yura's resistance.

But Yura's body is still too weak after all, and he is still prone to illness.

And once she gets sick, it will be very dangerous for her.

Chen Zhao was unwilling to control Yura and restrict her from doing this and that.

If possible, he hoped that Yula could grow up happily.

Rather than being a caged bird, watching others play, she could only watch silently.

Only in this way did she agree to the dangers of defecation.

Yura had a slight fever. Because of Yura's special constitution, he couldn't even take anti-inflammatory and antipyretic drugs at will.

At this moment, Lao Hei appeared next to Chen Zhao.

"I feel her death aura."

Chen Zhao's face suddenly turned bad. He was not angry with Lao Hei.

Regardless of whether Lao Hei exists or not, it means that Yura's physical condition has deteriorated again.

And, this time, life is at risk.

This also means that Chen Zhao no longer has time to linger on research.

Chen Zhao remembered that when his mother brought him to the United States, she actually wanted to donate bone marrow.

This shows that his bone marrow matches Yura's.

Generally speaking, siblings have the highest chance of matching their bone marrow.

Of course, Chen Zhao and Yula have the same mother and father.

In fact, donating bone marrow sounds scary, but it is actually not as scary as you think.

And there are safer donation options now than in the past.

Donating bone marrow actually requires the hematopoietic stem cells in the bone marrow.

The hematopoietic stem cells in the human body are actually self-divided from an ancestor, and then there will be more and more.

Therefore, after the bone marrow is extracted, theoretically the hematopoietic stem cells will divide rapidly to make up for the loss.

In the past, bone marrow donation had a certain quantitative ratio. Although it was relatively safe, there were still certain risks.

Nowadays, the blood culture method is used, which only needs to extract a small amount of bone marrow hematopoietic stem cells and then culture them in the blood.

Therefore, for the donor, the risk is minimized, and it is almost the same as donating blood.

This is also called peripheral blood stem cell transplantation,

"Cheryl, you go to rest first, Fali, you sleep with Cheryl tonight." Chen Zhao said.

"Yes." Fali nodded when she saw Chen Zhao's solemn expression.

Chen Zhao carried Yula down to the basement: "Old Hei, come and help me."

Chen Zhao didn't have the conditions required for a culture medium, so he could only perform a bone marrow transplant directly.

This kind of transplant operation is mainly performed on Chen Zhao. As the recipient, Yura only needs to passively receive blood transfusions, so there is not much problem.

The main problem still lies with Chen Zhao. Chen Zhao needs to find someone to help him transplant bone marrow.

Therefore, Chen Zhao needs to let Lao Hei extract the bone marrow for him.

Then the transplantation process is completed, and it must be carried out in the space gap.

"Chen Zhao, you first make an opening on your back, and then I use my life to extract your bone marrow."

"Yeah." Chen Zhao lay on the cold metal bed and stabbed his back with difficulty.

Yura was lying on the other bed next to him.

"Is the hole big enough?"

"That's enough, that's enough."

Lao Hei started to use magic, and blood was taken out first.

Then Chen Zhao felt a stinging pain, and white substance mixed with plasma gathered on Lao Hei's palms.

"That's almost enough." Chen Zhao said.

Lao Hei gently pushed the liquid in his palm to Yura's face, and the liquid began to slowly penetrate into Yura's body.

At this moment, a black line suddenly appeared behind Lao Hei.

The black lines looked like what Buddhists call **, and Chen Zhao looked at Lao Hei in surprise.

Lao Hei seemed not to have heard anything, and was still concentrating on using magic.

Finally, the bone marrow was completely integrated into Yura's body.

Only then did Lao Hei stop, and only then did he realize the changes in himself.

"Huh?"

"Old Hei, what's wrong with you?"

"It's a strange feeling, I've become stronger."

"Why?"

"It seems like I saved your sister."

"The seducer saved someone and got a reward?" Chen Zhao looked at Lao Hei with strange eyes.

"No, it's to save a dying man."

Lao Hei reached out to pull his hood, but a face like Chen Zhao was revealed.

"Fu**, why are you like me?"

"I can be anyone. My appearance means nothing to me now." Lao Hei turned into Fali's face again.

"Stop it, I don't want you to become like Fali."

"Okay." Lao Hei pulled up his hood again.

"Can the halo behind you disappear? It looks so awkward."

"I can't do it, and that's a sign of my ability."

"Just one more aperture, what's the point?"

"Now I am no longer the messenger of souls, but the messenger of death."

"Okay, the title sounds more scary, what else has changed?"

"I can appear to people."

"Well, this looks pretty scary, what else? Like help me kill so-and-so."

"No, if I kill, I will still be punished."

"It's still useless after all."

In fact, Lao Hei's biggest role is to deal with evil spirits.

He has the greatest power to intimidate evil spirits compared to Chen Zhao's demon servants.

Even Samael can't compare to Lao Hei.

However, given Lao Hei's attitude, he didn't seem too excited about his upgrade.

Afterwards, Chen Zhao carried Yura out of the gap in space.

In a daze, Yura seemed to wake up.

But he wasn't quite awake yet, and it wasn't until the light outside made Yura wake up.

"Brother...I seemed to have seen heaven just now..."

"Why do you think so?"

"There is a big, big castle. It must be the castle in heaven."

"Haha... you think so." Chen Zhao couldn't say that what you saw was not heaven, but the lair of the God of Death.