After su Yunchu's words, Murong yuan continued, "ah Chu is right!" there was no uncomfortable praise for Su Yunchu in his tone.

Su Yunchu shook his head. "The range of traditional bows and arrows is too close, and it is more difficult to practice. The use of them in the battlefield will eventually be eliminated." however, Su Yunchu also understood that under today's level, firearms have not been really well developed and utilized. Now, the long-range weapons on the battlefield are still bows and crossbows. These words, It's just an unprovoked sigh.

Murong yuan understood why Su Yunchu sighed, "what's a Chu's opinion?"

Su Yunchu put his bow and arrow aside, but picked up a bow and crossbow, "I prefer to use a crossbow compared with an arrow!"

With that, the crossbow in his hand conveniently landed and sent out an arrow feather, which hit the center of the target a hundred and fifty steps away.

However, today's crossbow can not compare with the level of later Tang and Song dynasties. One shot and one arrow are not far enough. It is no different from the range of bow and arrow. In addition to being simpler than the operation of traditional bow and arrow, it has little significance.

Seeing that Su Yunchu seems to be very skilled in using the crossbow machine, Yan Yishan is stunned again. Who is the woman Murong yuan is looking for!

Looking at Su Yunchu's use of the crossbow machine to launch a crossbow, and her posture is correct and natural, and then looking at her slightly disgusted at the crossbow machine in her hand, Murong yuan's eyes flickered, "ah Chu is not satisfied with the crossbow machine in the army."

Su Yunchu made no secret of it. "I'm really dissatisfied. I think the shortest launching distance of the crossbow machine manufactured with the current technical level should be 200 steps away."

Yan Yishan was dissatisfied. "Two hundred steps are far away!"

Su Yunchu looked at him and shook his head. "If there is more processing on materials and mechanisms, 300 steps will not be a problem."

"Oh! You're kidding." Yan Yishan couldn't believe her words.

Su Yunchu, however, did not respond to Yan Yishan's words.

Murong yuan, who was standing aside, really heard Su Yunchu's words, a 300 step crossbow, which he dared to think but could not reach. Beiliang is a fierce nation in the north. It has always been dominant in riding and shooting, and it is better than Daxin in in riding and shooting tools. Although the war has been frequent for so many years, But it is one of the reasons why there is no clear understanding between the two countries.

Su Yunchu no longer said much, but picked up the bow and arrow and continued to practice in the field. However, looking at Yan Yishan's previous look, he had a slight idea in his heart. He didn't know whether it could be formed in the end.

When he returned to Murong yuan's camp in the evening, Murong yuan was not in the camp because he had to deal with military affairs. Looking at the desk that Murong yuan should have stayed at, Su Yunchu went forward, spread a piece of white paper on the table, took a small unburned charcoal in the fire stove, and painted something on the spread white paper.

At night, as soon as Murong yuan entered the door, he saw that people who usually read military books and analyzed war reports of previous years on the soft couch were sitting behind the desk painting things. The people under the candlelight tightly closed their lips, very quiet and very serious. It seemed that there was less tenderness of girls, but more calmness of wise men.

Murong yuan unconsciously raised a smile and walked towards Su Yunchu.

Hearing the footsteps, Su Yun didn't lift his head at first, but made a natural sound, "Huai Qing, come and have a look."

When Murong yuan walked over and looked, he saw that Su Yunchu had drawn the shapes of several crossbow machines and small drawings of some parts on the white paper with charcoal pens of different thickness. It seemed that it was very different from the current crossbow machines.