Why did ancient China not develop gunpowder weapons on a large scale? How were western gunpowder weapons developed?

The owner's question is a bit interesting. Personally, I think that the Ming and Qing governments still recognized the power of gunpowder, and established special Shenji battalions and so on. But in ancient times, it took time, effort and talent to manufacture a dry musket. At that time are workshop manufacturing, unlike now, say easily is 100,000 army. It's not financially feasible. In addition, the technology of this era is indeed not good, the early musket fire rate is slow, affected by the weather is large, suffered cavalry assault will be finished. In addition, the number is small, which creates a vicious circle. The price is high, the production is small, the quantity is small, it is difficult to form a technical advantage, no technical advantage of the government is not willing to purchase. With the same price can produce more bows and arrows, combat effectiveness is much higher than the musket. The West is different, fewer people, so try to increase firepower, improve the effectiveness of single combatants. And then improve the combat effectiveness of the troops. So in the research and development of muskets farther and farther, after the industrial revolution, factories can be mass produced. For the future invasion and plunder to create the conditions.