Chapter 502: Old Black will also upgrade (seventh, ask for a monthly pass)

Until it was dark, everyone returned to the house.
Chen Xun did not let Xie Lier and Yula jump into the lake to take a bath again. If they were allowed to go down to the lake again, they would have to play in the dark again.
Ask them to clean up in the pool before going back to the house.
Although there is a swimming pool at home, Chen Ye and Fali are rarely used.
When Chen Huan and Fali played water, they went to the lake in most cases.
They also like the feeling of the lake, and most of the time the pool is used for playing with pets at home.
Of course, the water is changed every day.
But when Yura and Cheryl came back, Cheryl helped him back.
Chen Kun frowned, and pulled Yura to her side: "Yula, what's wrong with you?"
"Nothing, it just feels a little tired."
Chen Ye took out his stethoscope and examined Yura's body.
Last time Chen Kun's potion was given to Yura, which increased Yura's resistance.
But after all, Yura's body was still too weak, and she was still prone to illness.
And once she gets sick, it's very dangerous for her.
Chen Xun was unwilling to control Yura, restricting her from doing this and not to doing that.
If possible, he hopes that Yura can grow up happily.
Instead of being a bird in a cage and watching others play, she could only watch silently beside her.
Just so, she agreed that the danger would be.
Yura has a low fever. Because of Yula's special constitution, even anti-inflammatory and antipyretic drugs cannot be taken at will.
At this moment, Lao Hei appeared beside Chen Yan.
"I feel the breath of her death."
Chen Huan's face suddenly changed, and he was not angry with him.
Whether Lao Hei exists or not, it means that Yura's physical condition has deteriorated again.
And this time it is life-threatening.
This also means that Chen Yan has no time to study any more.
Chen Yun remembered that his mother had taken him to the United States in the first place, and she wanted to donate bone marrow herself.
This shows that his bone marrow and Yula are matched.
Generally, siblings have the highest matching probability.
Of course, Chen Yun and Yula are half-brothers.
In fact, donating bone marrow sounds scary, but it is actually not as scary as imagined.
And now there are safer donation programs than in the past.
Donating bone marrow, in fact, is all about hematopoietic stem cells in the bone marrow.
The human hematopoietic stem cell is actually an ancestor that divides itself, and then it will increase.
So after the bone marrow is extracted, theoretically hematopoietic stem cells will divide rapidly to make up for the reduced portion.
In the past, there was a certain amount of bone marrow donation. Although it is relatively safe, there are still certain risks.
Nowadays, blood culture method is used, only a small amount of bone marrow hematopoietic stem cells need to be extracted and then cultured in the blood.
So for the donor, the danger is also minimized, and it is almost the same as blood donation.
This is also called peripheral blood stem cell transplantation.
"Xie Lier, you go to rest first, Fari, you sleep with Xie Lier tonight." Chen Yan said.
"Um." Fali nodded when she saw Chen Yan's solemn complexion.
Chen Huan hugged Yula and went down the basement: "Lao Hei, come and help me."
Chen Ye does not have the conditions needed for the medium, so he can only perform bone marrow transplantation directly.
This kind of transplantation is mainly on Chen Yi's body. As a recipient, Yura only needs to passively receive blood transfusion, so the problem is not big.
The main problem was with Chen Kun, who needed to find someone to help him transplant bone marrow.
Therefore, Chen Yan needs to get Lao Hei to help him extract bone marrow.
The transplantation process is then completed, and must also be performed in a space crack.
"Chen Yun, you open a mouth on your back first, and then I use life extraction to extract your bone marrow."
"Um." Chen Yan lay on the cold metal bed, piercing his back hard.
Yula lay on another bed next to it.
"Are you big enough?"
"Enough is enough."
Lao Hei began to perform magic, first blood was taken.
Then Chen Yan felt a sting, white matter mixed with plasma, gathered on the old black palms.
"Almost enough," Chen Yan said.
Lao He gently pushed the liquid on his palm to Yura's face, and the liquid began to slowly penetrate into Yola's body.
Just then, a black line suddenly appeared behind Lao Hei.
This black texture is like what the Buddhists said. Chen Ye looked at Lao Hei in suspicion.
Lao Hei seems to have never heard of it, and is still concentrating on his magic.
Finally, the bone marrow was fully integrated into Yura's body.
Heihe stopped now, and only then did he discover his change.
"what?"
"Old Black, what's wrong with you?"
"It's weird, I'm getting stronger."
"why?"
"It seems because I saved your sister."
"Herald angels saved people and then got rewards?" Chen Yan's weird eyes looked at Lao Hei.
"No, it is to save a mortal person."
Lao Hei reached out to pull his hood, but Chen Chen's face was revealed.
"Fu , why are you the same as me?"
"I can be anyone, and looks are meaningless to me now." Lao Hei turned into Fa Li's face again.
"Stop it for me and don't allow you to look like Fally."
"Okay." Lao He pulled the hood back on.
"Can the aperture behind you disappear? It looks awkward."
"I can't do it. It's a symbol of my ability."
"Just one more aperture, does it make any sense?"
"Now I'm no longer a messenger, but a death messenger."
"Well, the title sounds more scary. What else has changed?"
"I can appear before people."
"Well, this looks scary, is there anything else? For example, who helped me out?"
"No, if I kill, I will still be punished."
"In the end it's still useless."
In fact, Lao Hei's biggest role is to deal with evil spirits.
He is also the most deterrent to the evil spirits of those evil servants of Chen Ying.
Even Samuel is not as good as Lao Hei.
However, with regard to Lao Hei's attitude, he seems not too excited about his promotion.
Subsequently, Chen Yan held Yura out of the gap between the spaces.
Strange, Yura seemed to wake up a little.
But it wasn't quite sober, and it wasn't until the outdoor lights shone that Yura woke up.
"Brother ... I seem to have seen heaven ..."
"Why do you think so?"
"There is a castle that is so big, that is the castle of heaven."
"Oh ... you think it is." Chen Yun can't say, what you see is not heaven, but the nest of death.