Fei Qian cannot directly cross the branches and forks of these scientific and technological trees, but can only allow craftsmen to accelerate their climbs, or skip some not very important development directions with purpose.

For example, Fei Qian said that copper cannons can still be developed, but at the same time, iron cannons must also be developed. Among iron cannons, not only will we continue to study the iron alloy technology in the direction of cast iron, but also the development of forging technology.

Steel is going to replace copper after all.

This time in the battle against the Western Regions, Fei Qian asked craftsmen to bring bronze cannons and cast iron cannons. However, because these heavy transport speeds of big guys could not keep up with the cavalry, Fei Qian integrated the Western Qiang soldiers on the one hand, so that these Western Qiang people could better adapt to their lives in the Han army. On the other hand, they were also waiting for the subsequent craftsmen to transport these cannons to Yumen Pass.

Now, craftsmen lined up artillery in the Gobi desert, waiting for Fei Qian's order.

The five on the left are bronze cannons, and the five on the right of the bronze cannons are cast iron cannons.

On the far right two seats are forged iron cannons.

The forged iron cannon is smaller than the big brother's bronze cannon and his second brother's cast iron cannon, and it is even uglier.

The bronze cannon and cast iron cannon at least look smooth and bright, with straight lines and beautiful curves. However, due to the innate shortcomings of the forged cannon, not only can some forged spots be seen on the whole, but also because the entire cannon body is made of two semicircular cannon bodies, with layers of iron hoops added to the outer layer, so it is like a long section of flat large bamboo, and even the iron shells fired are one size smaller than other cannons.

It is very intuitive. The power of forged iron cannons is obviously not as powerful as bronze cannons and cast iron cannons. The only advantage is that this thing is smaller in size, lighter in weight, and more convenient for transportation. It may be used as a key equipment cannon on boats and ships, or as a military cannon to support infantry in the medium and short range.

While Fei Qian was thinking, the various groups of the artillery were ready and were waving flags with red bottoms and yellow sides.

"Five rapid fire shots!" Fei Qian issued an order.

As the orders on the stage were conveyed, the whole world seemed to tremble the next moment. A huge roar rolled on the Gobi Desert, shaking some of the war horses and soldiers under the platform moved uneasily. Not to mention the Western Qiang infantry who had just joined the array, some Han people who had never seen artillery were also trembling, and some of the war horses could not control their fear. They actually rushed out of the queue and ran out of the open space when they were frightened.
Chapter completed!