After hearing the report of the sentry monkey, Su San couldn't help but be taken aback, and said in his heart: "Dog, you came back so quickly!"

So he hurriedly ordered the whole army to retreat quickly, and after meeting with the blacksmiths, he continued to move to the sea.

At the blacksmith's hideout, Su San was very happy to see that the blacksmiths were still there, and shook hands with them one by one, and a blacksmith monkey suggested to Su San: "Chief, I have an idea, can we go in and retrieve the iron tips of those spears after the fire in the woods is extinguished." ”

Su San thought for a moment and said, "Your idea is good, but I have to send a scout monkey to investigate." Maybe the enemy army has returned, but I'm afraid that your idea will be difficult to implement. ”

He then arranged for two clever scout monkeys to find out, and a few minutes later, a bow and arrow assault team (consisting of fifteen lemurs) was sent to meet them, just in case they were needed.

An hour later, all the lemurs sent out returned, and the scouts reported that this group of enemy monkeys was not a "fire in the night" force, but a very large army of black langur tribes, numbering more than a thousand, because there was a big waterhole here, so they now planned to temporarily station here, and later, they were discovered and pursued by enemy monkeys, but fortunately, the bow and arrow assault team sent by Su San later fired resin "rockets" in time to stop the pursuit of the enemy, and they were able to escape back.

It seems that this is a team that has nothing to do with the "fire in the night", if they can fight with each other, it would be great, let's have a "sit on the mountain and watch the tiger fight", and when they lose both, we will not be too late to strike.

Thinking of this, Su San decisively waved his hand and ordered: "Set off immediately and advance to the sea." ”

When the soldiers heard that they were going back to the seashore again, they couldn't help but be elated and refreshed at the thought of the barbecue delicacy with sea salt, but the blacksmith monkeys were very puzzled, why did the leader go so far to the beach if they didn't let them go back to pick up the spears and iron heads? Isn't this more than worth the loss?

The blacksmiths didn't know what to do, and when they asked the spearmen and monkeys around them, they knew that it was for the delicious taste, and they couldn't help laughing: Could it be that this is a group of greedy and delicious monkeys?

Everyone thought that Su San took them to the beach to add salt and deliciousness, but in fact, this was only a small reason, and another big reason was that he wanted to go to the remote environment of the seaside without being disturbed by foreign forces, to develop his own "secret weapon" - black **.

The reason why I want to do this is because the enemy army is getting stronger and stronger now, and the troops like "Night Fire" have now completely mastered the cold weapons invented by Su San, such as spears and bows and arrows, and they can also poison the snake array, and even launch rockets, not to mention that their IQ is also very high, maybe not under Su San.

And the strength of another army of thousands of black langurs is also very strong, at least the black langurs are taller and stronger than lemurs, and the quality of individual soldiers is much higher than that of Su San's soldiers, and the leader of this monkey army does not know the details, but it should not be a rice bucket, otherwise, how to lead so many soldiers and monkeys.

In view of the above reasons, Su San felt that it was very necessary to develop a weapon to defeat the enemy, and in his memory, only the "secret weapon" that had not yet been developed was "black **".

So, soon after Su San's team arrived at the beach, he began to develop the black **, and personally went out to lead the blacksmith monkeys and ten selected clever and industrious soldier monkeys to increase the development process.

Black ** is composed of saltpeter, sulfur and charcoal, and the first two of these three things are more difficult to find in nature.

Saltpeter in nature is often formed by the decomposition of nitrogen-containing organic matter in the soil under the action of bacteria, oxidized into nitric acid and potassium in the soil, so whenever the autumn season is high and cool, it is usually precipitated in the form of a shell or salt flower, covering the ground of dry saline-alkali land and the foot of the rock cliff, which is called ground frost.

At this time, it was autumn, and the autumn was crisp, so Su San took everyone to look for those places where saltpeter might appear, and really let him find something like saltpeter, and to test whether it is saltpeter, the method is very simple, just throw a small piece of saltpeter to be tested on the red-hot charcoal, if it burns violently, then it proves that it is saltpeter.

Secondly, it is to find sulfur, which is the most difficult thing to find in the three types of materials, Su San and they searched for many places, but did not find it, and later, when they were almost desperate, suddenly, by a very chance, in the deep mountains and valleys, they found a very secret hot spring, and around this hot spring there was a faint smell of pungent sulfide, which made Su San and others couldn't help but be overjoyed, so they searched carefully around the hot spring, and it didn't take long to find a small piece of natural sulfur ore.

Later, they dug and searched everywhere, and gradually, they found more and more sulfur ore.

Once the two main materials of saltpeter and sulfur are collected, charcoal is as simple as breaking branches and burning them into charcoal.

Next, it is to start making black **, first grind these three materials into powder, mix them together in a small portion, stir well, put them into a small gourd, and then throw the lit hay into the small gourd to see if there will be an explosion, if not, then adjust the ratio between the three powders again until a more ideal explosion is produced.

After mixing the ratio between saltpeter, sulfur and charcoal, it was basically successful, but the black ** lead was still missing.

The composition of the lead of black ** is similar to that of ***, except that the ratio between saltpeter, sulfur and charcoal is different.

After the black ** is made, a series of experiments will be carried out in nature, and the amount will slowly transition from a small amount to a large amount, and the power of the explosion will become more and more powerful.

When the power reached a large enough and basically met the needs of the operation, Su San asked for mass production, which required a large number of collected raw materials, so he sent almost all of them out to collect and carry them to produce a large number of practical black ** in order to supply.

At present, most of the objects used to load black ** are natural plant shells such as gourds and coconut shells.

A month later, Su San's team actually made five or six hundred of the most primitive black **, piled together like a hill, so that Su San was full of confidence in the victory of the war that was about to take place in the near future.

At the same time as making these, Su San also asked everyone to make more than 300 tree vine back baskets, so that each soldier monkey had a back basket to load two black ** and sea salt dried palm leaves and other items.

Now everything is ready, on a sunny day, Su San led his assault team, majestically marching towards the "mountains and rivers", intending to find the "night fire" to start a decisive battle.