ng was invented decades ago and was very popular at first. It uses gunpowder as a fuse to fire projectiles, with the power of a crossbow.'"Saying that, he took out an object from the toolbox he had sp...d the princes had a pretext for rebelling under the banner of Prince Qin.The day before yesterday, Zhao Xuanji could use the excuse of disrupting the court order to confine him in Tahe Hall. Now that...