A minute later.

On the plateau, a thousand kilometers away from the No. 13 military base where Yang Yi and the other mutants were located, an area full of strange rocks and surrounded by groups.

Among the peaks of Mianyang, an area of several square kilometers looks inconspicuous on a small hill. There was a rumbling sound from underground.

The next moment, an incredible scene appeared.

A crack suddenly appeared in the middle of the originally calm mountain, and it quickly cracked to both sides like a giant roof.

In just a few seconds, a large hole with an area of five square kilometers appeared in the middle.

The big cave is brightly lit, it looks empty and huge, and there are a large number of planes parked, and it looks extremely busy, just like an underground military airport with an area of dozens of square kilometers.

Reconnaissance planes, fighter planes, bombers, and patrol planes are secretly parked at thousands of take-off points on the airfield.

This is the No. 8 underground airfield of the Chinese Aerospace Forces in the Southern Theater of Operations, built at a height of 200 meters below the ground.

This is a backup military facility built by the Aerospace Forces two decades ago to withstand a nuclear strike. The purpose is to prevent the invasion of an irresistible enemy, the normal functioning of troops after the destruction of military facilities on the ground.

It is precisely because the various branches of the military have this huge system of military bases located under the ground throughout the country that they can ensure that the army can still function even when the Maltese have full control of the air power.

"The fifty-first squadron of the Condor is ready to take off!"

In the No. 1 take-off area of the airport, 200 drones with the latest flying wing layout of the 51st UAV Squadron of the Condor have arrived at the take-off point and are requesting to take off.

"The Hammer Brigade is loaded, please take off!"

In the area of the No. 2 take-off point of the airport, fifty manned bomber fighters requested to take off.

On the holographic video of the theater joint operations command center, Chief of Staff Gao Hui was paying attention to the planes preparing to take off at the No. 8 underground airfield of the Aerospace Forces and giving the take-off order.

"The Fifty-first Squadron of the Condor can take off, and your department will act as the vanguard to attract the firepower of the Maltese side-shaped spaceship!"

"The Hammer Brigade and your unit will carry out carpet bombing of the Maltese ground forces near Base 13, and if necessary, seize air supremacy over 100 square kilometers of airspace over Base 13, protect the air safety of the mutant troops, and buy time for the ground troops."

"Condor Fifty Squadron received!"

"Hammer Brigade received!"

In an instant, hundreds of bat-shaped planes with blue tail flames at the bottom flew out from the crack at the top of the mountain, forming a formation and flying out of the mountaintop.

Over the originally silent mountains, a formation of hundreds of fighters suddenly appeared, which looked extremely spectacular.

After more than ten seconds, when all the planes had been dispatched, the top of the mountain quickly closed and the silence was restored, and it looked no different from the place where it was moved.

At the same time as the Aerospace Forces were dispatched, the Rocket Force base, which was also located underground, also received an order to attack the Maltese and launched a new round of firepower strikes.

Hundreds of missiles carrying the latest models of armor-piercing warheads took off from concealed launch bases with tail flames in tow to strike at the ground forces of the Maltese fighting with the Army's reinforced brigades.

Chief of Staff Gao Hui watched the dynamic situation of the battlefield displayed by the holographic video with all his body intent, and his heart was slightly relieved.

The order for the Theater Rocket Force and the Aerospace Force to reinforce Base 13 has been issued, and if nothing else, it should be able to delay the Maltese Air Force and ground forces to eliminate Yang Yi and other mutants, and buy time for the convergence of the two forces.

"Old Gao, where is the ground diving force? How far is it from Base Thirteen? We shouldn't use this war zone underground killer to use the power. Liu Hong, commander of the theater of operations, said as he looked at the movement of various troops on the holographic screen in the command hall.

"Diqian No. 1 is currently located at the No. 9 underground pier, six hundred kilometers away from the No. 13 base. I'm in favor of going out to dive one. In the absence of air supremacy, the forces on the ground had little effect, and the use of this force could avoid Maltese air strikes. Chief of Staff Gao Hui also agreed.

"Then give the order, it's the right time to use it now, and I'm afraid it's too late. Now that there are ground and air feints to contain the Maltese, we have a better chance of success. "Theater Commander Liu Hong added.

"Submarine One, Submarine One, order your department to dispatch immediately to the thirteenth base to pick up a mutant unit of three hundred and fifty people, and the coordinates have been uploaded to your data center." The Chief of Staff personally gave the order.

"Hidden One: Understood!" On the holographic video of the theater joint operations command center, the commander of the ground submarine unit wearing army combat clothing answered.

At the same time.

It is 600 kilometers away from the position of Yang Yi and other mutants, and it is a huge military base that is 300 meters deep. Dozens of strangely shaped, 10,000-ton military equipment are quietly parked.

This is the killer feature of the PLA Army equipment, the ultra-high-speed underground submarine force.

The heads of these underground submarines look somewhat similar to ordinary shield machines, except that they are powered by the latest models of military nuclear fusion reactors, and their heads rotate at high speed instead of the cutting blades of ordinary shield machines, but devices that can emit ultra-high temperature energy.

By firing millions of degrees of heat, it can accurately and quickly vaporize and cut through the dirt, rock, and metal in its path, and carve a passage through the ground at a speed of 1,000 kilometers per hour, while carrying 1,000 heavily armed soldiers in the second half of the submarine cabin.

The original form of this unit was the engineering unit, which was mainly responsible for the construction of underground works.

Later, due to the development of military shield machine technology and the need for combat readiness, the army put forward the requirement of building an underground combat force as soon as possible, and the underground submarine force came into being.

The purpose of the formation of this unit is to serve the construction of underground military facilities in peacetime, and in wartime, it is to serve as a sharp weapon for the army to quickly open underground passages and attack the enemy by surprise.

As early as 30 years ago, at the beginning of the formation of the troops, the Military Mechanical Research Institute proposed a plan for the construction of underground submarines powered by the latest miniaturized, high-power fusion reactors and high-energy laser knives as weapons.

This plan was highly valued and supported by the Army, and after tens of thousands of underground cutting experiments and ultra-high-speed underground passing experiments, today's underground submersible unit was finally formed.

The latest model of underground submarines is not only capable of traveling at high speed and carrying soldiers in a completely unfamiliar geographical environment, but is also equipped with 50 missiles with the latest model of small nuclear warheads.

"Report, the ground dive 1 has been dispatched, the ground dive 1 has been dispatched."

Just 10 seconds after the chief of staff of the theater issued the order to the ground submarine unit to dispatch, a loud rumbling sound was heard from the underground submarine base, and a jet-black underground submarine drove out of the underground submarine base.

After driving 300 kilometers out of the original route of the base at a speed of 3,000 kilometers per hour, and entering the lineless area hundreds of meters underground, the head of the submarine suddenly lit up with a dazzling high-temperature energy field, and began to cut the soil, stones, metals and other materials in front of the submarine, and quickly advanced towards the coordinates of the No. 13 base where Yang Yi and the three hundred mutants were fighting.

"Yang Yi, we are the Chinese Aerospace Force, we were ordered to reinforce you, if you hold on for another half an hour, our other reinforcements will arrive!"

Just when a large number of Maltese pentagonal spaceships and ground armored troops approached the three hundred and fifty mutants near Base 13 and began to bomb and attack, Yang Yi's heart was burning. Eight manned fighters of the Chinese Aerospace Forces broke through the blockade of the fire network of the Maltese pentagonal spacecraft and appeared above Yang Yi's head.

And now Yang Yi and the remaining three hundred and fifty mutants have already engaged in a fierce battle with the Maltes in the defensive positions along the canyon.

"Chinese Aerospace Forces! It is the aircraft of the Chinese Aerospace Forces, everyone hold on, our reinforcements have arrived! ”

Yang Yi saw the blue fighter in the shape of a bat above his head, and shouted excitedly as if he saw a loved one.

"The Chinese reinforcements have arrived, there is hope for us to get out of trouble, guys, let's hold on!"

Huge bat wings grew over the canyon, and the tiger-headed mutant who was fighting with a mutant puppet beast flying in the air of the Maltese also screamed excitedly.

"Yes, let's withstand the Maltese attack!"

When the others saw the blue fighters of the Aerospace Force, they also shouted excitedly, and their morale was boosted in an instant.