Which is more powerful, a modern compound bow or an ancient bow?

The power of a bow and arrow mainly depends on the initial speed, arrowhead and arrow weight. All bows and arrows have an upper limit, just like a car engine has an upper speed limit. The modern compound bow is the evolution of ancient Egyptian bows and arrows, arrows do not do big, and China's ancient bows and arrows are generally very large. During the Qin Dynasty, they could be made like javelins. Small arrows, if the modern composite bow a little more powerful, I'm afraid it's hard to say if it's big.