Bone marrow is the hematopoietic tissue in the human body. The important function of bone marrow is to produce stem cells that produce various cells. These stem cells differentiate and regenerate various blood cells such as red blood cells, white blood cells, platelets, etc. Simply put, the function of bone marrow is hematopoietic function. Therefore, bone marrow is very important for maintaining the body's life and immunity.

In the three stages before, middle, and last stages of Huajin, the tendons, bones and marrow are actually tempered, but the focus of each time is different. In the later stage of Huajin, the focus is to temper the bone marrow, and the bone marrow is located in the marrow cavity of the long bones and in all bone cancellous substances.

Therefore, it is very painful to cleanse marrow. Chen Kan heard from Li Shuwen that a warrior who has been suffering from the marrow was once a warrior who was suffering from the marrow cleaning was dying, which shows his pain.

The key is that the progress is very slow. Even if you practice diligently every day, it takes several years to work hard. It took Li Shuwen eight years and Sun Lutang seven and a half years to endure such pain for such a long time. Therefore, cleaning the marrow is not only a cleansing of the bone marrow, but also a baptism of the spirit of a warrior.

So is there a way to speed up?

Yes, it is recorded in the Huo Family Boxing Book and the Tang Sect secret book that if you can continue to use medicinal materials that can strengthen qi and blood and perform counter-replenishment, you can speed up the progress of marrow cleaning. Of course, the pain cannot be slowed down, and it may even increase.

Moreover, these medicinal materials are very rare. They all have to be in the year. On the plane, Nong Jinsun also searched for Chen Kan for a long time before finding the herbal materials for the Anjin Medicinal Bath. What's more, it is even more difficult to get them together. However, I didn't expect that in this world, the military could provide Chen Kan with so many rare medicinal materials. This surprised Chen Kan, and he couldn't help but sigh that the name of the country was easy to use.

In fact, the things Chen Kan used are nothing at all. In order to do some experiments, the military is really a big consumption. Compared with them, Chen Kan's consumption is really called a drop in the bucket.

The Cheetah Commando, the base camp, has two months of screening, and now there are seven people left, all of them sitting here, and in addition to that, Lieutenant Colonel Phillips is also there.

"Boss, what are you going to do when you come to us this time?" Nick asked.

"How long have you been here?" asked Lieutenant Colonel Phillips.

“One year.”

"Yes, it's been a year, and now is the time to test you."

When everyone heard the lieutenant colonel's words, their eyes lit up, and the matter was finally coming. There was a lot of controversy about whether their troops should exist in the upper class. This question has been debated.

Some people think that a force with such a small number cannot have any major effect. Assault troops, one cannon covering them will have to be finished.

Some people think it is necessary that such a unit with super attack capabilities can perform some special tasks, and such a unit is very necessary.

Of course, there are some people who have strange reasons, that is, Japan and Germany are now forming such troops, so the United States, as a major power, is also necessary.

In short, there is a debate now that this army has a meaning of existence, and there is only one way to stop this quarrel, that is, to use military merits and to make those who question it shut up.

So when they heard that the matter was coming, everyone immediately became energetic. They were also very clear about the arguments, so they always wanted to go to the battlefield independently to prove themselves.

"Here!" Phillips pointed to a place on the map, and this was the goal this time.

Chen Kan sighed in his heart when he saw it: "This time my goal is really not simple."

Located at the junction of the eastern part of Panamadalian Province and Colombia, it is called the Dalian Grain. The area maintains the original appearance of the rainforest. Chen Kan remembers that the most famous thing here is kidnapping and military armed forces. In the real world, a teacher who studied South American history at Southern University was kidnapped while inspecting here, which was a major event that caused a sensation in the school at that time.

This is located at the gap of the Pan American Highway. The so-called Pan American Highway is the longest road in the world. In this plane, this road has been built. It starts from Alaska, the United States, and passes through most parts of Central and South America, basically connecting the entire America.

The road was interrupted in the Dalian Grain area because of jungle blockage. The road was interrupted by about 160 kilometers. People who drive cars usually put their cars on the boat, sailed to Venetola or Colombia, and then started to drive on the road.

Most of the Daren Grain is controlled by some armed forces, which are filled with smugglers and other paramilitary armed forces. Foreign tourists are sometimes kidnapped and ransomed.

As the United States, which regards South America as its back garden, naturally does not allow such a powerful force, but it has never been able to be cut off because the environment here is too harsh, and the large army cannot carry out its operations, and the cost of action is too high.

So the military is preparing to verify the capabilities of this cheetah commando that has not yet been officially established. If it can open up the situation here, it will prove that this force is indeed necessary. If it fails, then disband.

Of course, it was not required that the Cheetah Commando clear the place. There were only seven people, and no one knew that it was impossible. This time their goal was the largest drug trafficking organization here.

"Of course, it's not that you want to act now. Our people have already contacted them. I believe that news will be heard soon, so you must be prepared!"

"No problem, head, don't worry!" Everyone patted their chests and promised.

"Very good. The captain of this operation is Chen. Do you have any objections?"

Everyone shook their heads. Although Chen Kan was a yellow man, he used his own abilities to conquer them in the past year.

"Okay, after our people get the news, you will start to act. Remember this time you not only have to complete the task, but also do it beautifully. Otherwise, do you understand what you know about the consequences?"

"I understand!" Everyone stood up and said seriously. The biggest shame for a soldier was the disbandment of the team because of their own failure.

"Okay, is there any other problem?"

"Report." Chen Kan said loudly.

"speak!"

"Can I let me go to that area first? I remember a group of Ambella tribes who have lived there for generations. They must know the situation there best. I want to learn from them for a while."

"study?"

"Yes, first familiarize yourself with everything there and arrange a specific action plan."
Chapter completed!