Guns and bombs both are the invention of China and the purpose was nothing but killing. People often mix bombs and dynamites but they are not the same. Their work of action is same but they were made in different place in different time and to do different jobs. It is necessary to tell that dynamites were made for mining, construction works, quarrying and demolition.

But Guns and bombs both was invented and manufactured and still going on and on just for killing purpose.   

In China gun powder was first made which had a name black powder. In 9th century Chinese chemist made first so called gunpowder mixed of sulfur, saltpeter and charcoal which was actually used for treating skin infections. But military quickly find out it's another purpose and that is destruction.

In 10th century first gun was  made of bamboo or metal pipe to blow flames or shrapnel to kill. Day by day guns were modified and toady it's easy to find any kind of guns.

Bombs were actually made on 12th century. It was first made with bamboo tube and gunpowder inside. Later in 13th century bombs were made in cast iron shells poured with gunpowder. It first use in the battle between Jin dynqsty against song dynasty in China. 

I think you got the right answer from me.