For a while, the situation became extremely critical. At this time, all of a sudden, Liu Qingshan had a flash of inspiration, and he suddenly thought that the science and technology center that he had just built could actually be upgraded. Moreover, once upgraded, the combat performance of many of its combat units will be significantly improved. In that case, then, what are you waiting for?

So, after thinking of this, Liu Qingshanma* moved to the science and technology center that had just been built. Sure enough, at this time, Liu Qingshan saw that above the operation interface of that science and technology center, there was a golden button that was flashing there. Liu Qingshan took a closer look, and then found that the golden button was called "Fire Upgrade". After seeing this, Liu Qingshan couldn't help but be overjoyed, and even saw that as if in the dark, God had been taking care of him.

Otherwise, why is it that there are always some incredible ideas in my mind at the most critical time, at the most dangerous moment. It was these incredible thoughts that allowed me to finally get out of trouble, out of danger, and even out of perdition.

So, after seeing this, Liu Qingshan clicked the golden button without hesitation. However, at this time, just when Liu Qingshan had just clicked the golden button, a systematic voice appeared in his ears: "This option will cost 100,000 production and construction funds." After hearing this, Liu Qingshan couldn't help but be surprised. Wow, fuck, 100,000 production and construction funds? So much!

Liu Qingshan knew very well in his heart that so far, he now had a little more than 100,000 production and construction funds in his hands. It can be said that the 100,000 production and construction funds are basically all of his belongings. If you, this is 10,000 production and construction funds, all of them are used here, then it means that you will become a poor egg.

However, under the current crisis situation, Liu Qingshan knows that there is no way to do it. Stay in the green mountains and don't be afraid of no firewood. As long as you can keep the safety of your own military base, then you can earn back this money. However, once he really loses this military base, then every qiē and every qiē will be in vain.

Therefore, after thinking of this, Liu Qingshan gritted his teeth, turned his heart sideways, and then decisively clicked on the golden button. So, immediately after, Liu Qingshan found that all his combat units, with the seemingly very casual action he had just made, had actually undergone obvious changes. The most obvious point is that their bodies began to flash a golden yellow light. Moreover, that layer of golden light, tightly wrapped around each chariot, looked very sacred.

At the same time, the attacking firepower of the remaining seven to eight Menniu Dog chariots, which were engaged in two-to-air operations, suddenly increased. The trajectory of the anti-aircraft missiles they fired out also turned into a very bright purple red, and it looked very dazzling and eye-catching. Soon after, dense purple-red anti-aircraft missiles hit the air one after another, and were slowly approaching Liu Qingshan's military base, on top of some biological warships with alien satellites. As a result, after only a few knee pads, two of the alien alien creature warships actually rose billowing black smoke under this fierce attack. It seems that the attack just now was still very big for them.

In this way, after Liu Qingshan was successfully upgraded to his own science and technology center, the attack firepower of some of the chariot combat units under his command has been greatly improved. In particular, the Gate Cow Dog Chariot of the alien alien ~ biological warship that is attacking in mid-air with all its strength is extremely powerful, and I don't know how much it has improved compared to the time just now.

In this way, not long after, the two biological warships on the alien side, at the beginning, emitted billowing smoke, and it seemed that they could not support it for too long. Soon after, one of them suddenly had a violent movement, and then, swooping straight down, crashed into the ground, and exploded into a dark red explosion. The other one, directly in mid-air, exploded into countless wrecks and debris, scattered in all directions, and fell to the ground, looking like a meteor catching the moon.

However, after all, in terms of alien aliens, there are at least seventeen of those biological warships that have attacked. In this case, in terms of alien aliens, it is also very surprising that Liu Qingshan's Door Bull Dog Chariot has suddenly improved its attack ability so distinctly. In the face of the two biological warships on their own side, they were shot down by the other party so easily, and the alien alien side also felt a little incredible.

Therefore, in this case, the other party first specially dispatched five biological warships to deal with those Men Niu Dog Chariots. The remaining seven biological warships continued to fly towards Liu Qingshan's military base. So, just like that, a larger-scale battle for open space once again kicked off-

At this time, in this situation, Liu Qingshan knew that his only way was to concentrate all the air defense combat forces and destroy the alien aliens, those biological air warships, because now the air warships of those satellite alien creatures have flown to the vicinity of his military base. For a time, the situation seemed very pennant. Because, once the air warships of those alien alien creatures really do not lead the air above their own military base, they will cause an extremely powerful attack on their own military base. Inside, however, is the most important military facility in Liu Qingshan's side. Once those military facilities were damaged, for Liu Qingshan, it would be a catastrophe.

Yes, Liu Qingshan knows very well in his heart, so in this case, he should be cautious, calm, and calm, and not be able to mess around. In this case, because not long ago, in order to make a living of his own combat weapons, Liu Qingshan had already spent 100,000 yuan in production and construction funds, and there was not much money left in his book. Under such circumstances, it is certain that, at the very least, in a short period of time, Liu Qingshan will not be able to produce as many combat units as possible. However, in his military base, the biological warships of so many alien alien creatures are approaching. Moreover, although their remaining combat weapons have been upgraded and their offensive firepower has been significantly strengthened, their own defense capabilities have not been improved. In the face of the fierce attack of the five biological warships, how long can it be supported, to be honest, Liu Qingshan has no bottom in his heart.

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Of course, there is only one way, and that is to temporarily mobilize some mammoth tanks from their frontline positions and come back for reinforcements. Although, for this practice, Liu Qingshan also made a decision in desperation. Because, on the outside of that stone bridge, in their own front-line positions, and the form of combat is also not optimistic. A large number of opposing ground forces are frantically attacking the Great Wall of Steel made of Mammoth Tanks. In this case, if you come back with a few mammoth tanks from there, you can be sure that the dangerous situation there will be further exacerbated.

However, if you don't do this, then your military base will be directly attacked. In this case, to be honest, Liu Qingshan is really very restless. Fortunately, however, the guide car has already been produced. The guide car is actually a small survey vehicle. This kind of guide vehicle is able to extend the sphere of influence of her own military base to where she arrives. Therefore, in some cases, in many cases, this kind of guidance vehicle can completely replace the reconnaissance vehicle and expand the sphere of influence of its own military base. In this way, it is natural to be able to provide support from their own bases for those combat forces that are far away from the bases and fighting alone.

Looking at the guide car, which was finally produced, at this time, Liu Qingshan finally let out a long breath. Yes, this atmosphere, after all, is too oppressive. It should be said that for a period of time, Liu Qingshan has been in this extremely depressing atmosphere, his nerves are tense all the time, and even Liu Qingshan is even worried that if he continues like this, it is difficult to say whether he can hold on.

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However, after all, Liu Qingshan finally produced a guide car. At this critical time, it is undoubtedly a relief in the snow. Immediately, Liu Qingshan gave an order, called a large transport plane, and then loaded the guide car that had just been produced into it, and then flew quickly towards his front-line position.

It should be said that at this time, in this situation, this guide car is of great significance to Liu Qingshan. It is basically Liu Qingshan's hope, a kind of hope in the midst of despair. Not long after, the large transport plane finally flew over the stone bridge and flew over Liu Qingshan's forward position. Then, slowly descending, the guide car, released.

And just after the guide car landed on the ground, Liu Qingshan impatiently unfolded it. Immediately afterward, within the influence of that guide vehicle, several maintenance plant drones immediately began to repair the damaged mammoth tanks. Since then, those Mammoth Tanks, whose health has been knocked out by more than 80 percent, can no longer hold on. In this case, several maintenance drones are desperately repairing them, and even Liu Qingshan can see that the few mammoth tanks that are being repaired are rapidly recovering at a speed that is visible to the naked eye. Restored.

Soon after, the health of the seven Mammoth Tanks had actually recovered to their peak state. Yes, although at this time, they are still suffering from the crazy attacks of those satellite aliens, but, after all, behind them, the guide vehicle that has just been deployed, and the maintenance drones released will provide them with meticulous maintenance services at all times, so that they have no worries.

In this way, it is equivalent to, torture, greatly improving the combat performance of those mammoth tanks. In this way, the Great Wall of Steel composed of Mammoth Tanks naturally further improved their defense capabilities, and in this case, Liu Qingshan was naturally more at ease.

So, randomly, Liu Qingshan pulled out the Tiger car from the Great Wall of Steel composed of more than a dozen mammoth tanks. If it had been placed in the past, it was certain that the Great Wall of Steel, after being dispatched with five Mammoth tanks, would have been defeated in the face of the fierce ground fire attack of those satellite aliens, because they themselves had already reached the limit. Many mammoth tanks are already on the verge of collapse.

Now, however, behind them, the unfolded guide vehicle is constantly unleashing maintenance drones, providing meticulous repair services for damaged mammoth tanks at every turn. In this way, although the Great Wall of steel is not said to be impregnable, it has been unbreakable for a certain extent. Under such circumstances, Liu Qingshan felt that five mammoth tanks were drawn from them and returned to his military base.

And at this time, in terms of alien aliens, the Wusu biological warship was violently impacting Liu Qingshan's several Men Niu Dog chariots on the ground. The battle was very fierce, and between the two sides, the most powerful attack missiles were fired one after another, and you came and went, and there were casualties on each other.

It should be said that after Liu Qingshan upgraded his attack firepower, those Men Niu Dog Chariots were attacking, and they were indeed much more powerful than before. However, their biggest weakness is that their defense is too poor. In the face of the biological carrier-based aircraft released by the dense satellite alien warships, the extremely fierce attack was also powerless. To the ground, coaxing, coaxing, coaxing, one explosion after another, one after another, the chariot of the Door Bull Dog, and in the midst of the storm, in the lightning and thunder, the fire flashed, and disappeared without a trace.

At this time, the battle basically entered the most critical moment. However, it is clear that in this case, the warships of those alien alien creatures have a clear advantage. The speed of the biological carrier-based aircraft they released is very fast, and the attack firepower is constantly increasing, and they seem to have vaguely seen the hope of victory.

Yes, because on the ground, Liu Qingshan's Door Bull Dog Chariot deployed there is also his last, the last line of defense against these alien alien creatures. At this time, there were only three of those Men Bull Dog chariots left. These three Men Niu Dog chariots still went all out and did not flinch in the slightest. Moreover, Liu Qingshan even saw that most of them had been upgraded to the level of two-star veterans. If this was placed in normal times, Liu Qingshan would be very happy. Because, after upgrading to the two-star veteran level, it is not far from finally being upgraded to the three-star elite level.

But now, to be honest, Liu Qingshan doesn't have any thoughts to think about these upgrades. Because he knew that these Men Niu Dog chariots, although they had made outstanding achievements, they had accumulated a lot of experience points in the process of fighting, so they had only reached the two-star veteran level. However, having said that, the actual situation is that these three Men Niu Dog Chariots, at this time, in this situation, have been mottled and their health has been greatly reduced, which means that they are actually on the verge of collapse.

It can even be said that even in such a situation, they were able to persist in fighting, purely out of a conviction, from a strong spirit, an incomparably tenacious will. However, the spirit belongs to the spirit, the will belongs to the will, the comprehensive combat performance, and the specific situation of their health value, this is the last word. In this case, the three-door cow dog chariot will actually be destroyed at any time. For this point, in fact, Liu Qingshan's heart is very clear.

However, at this critical moment, the estimated mammoth tank, mighty and booming, idle, the winding mountain road, is heading here. After seeing this, Liu Qingshan's eyes couldn't help but flash a ray of hope. He knew that help had finally arrived.

Sure enough, not long after, swishing, swishing, swishing, to the mammoth tanks, while rushing towards this place madly rushed, and at the same time, because they were already within their attack range, one after another, the anti-aircraft missiles continued to shoot out, flew away, and attacked the target in mid-air.