Because the communication in this era is not developed, everything has to be transmitted by people. Not only is it wasted time, it will also miss opportunities for war.

As for the order to fire the artillery, due to the range of the artillery, the artillery must keep a distance from the large group of people ahead. If the support of the soldiers and artillery is urgently needed, the warplanes may have been delayed when the person who sent the order.

Therefore, Huaju made a special batch of signal arrows, which tied a small round bamboo tube to the arrow, which filled it with gunpowder and different pigments like a firecracker. When it was about to convey the signal, it ignites the lead to the signal.

When the arrows shoot into the air, the gunpowder in the bamboo tube explodes, and the pigment will be released in the space. Even if it is seven or eight miles apart, or even further apart, the Fenglei Cannon Battalion can fire the cannon, which is much faster than using humans to transmit it.

Zhou Yuandi took the bow off his body, pulled out the signal arrow from the quiver pot and placed it on the bowstring. After Zhong Daming took out the fire slit and ignited the lead. Zhou Yuandi immediately shot the arrow into the air behind.

Bang!

The signal arrow exploded in the air, and the red pigment formed a red mist like a veil, floating slowly in the air.

When Xia Ning saw the signal, he immediately ordered: "Fire the gun."

The artillery soldiers who had already prepared the fire note together ignited the leads of the wind and thunder cannons.

Bang!

Bang!

Bang!

The wind and thunder cannons were roaring, and two hundred stone bullets flew out from the muzzle and flew towards the army of Liangshan.
Chapter completed!