When you travel in china, you’ll be interested in
The compass is an instrument showing the direction. The earliest south-pointing instrument looked like a spoon. The round compass came into being after constant improvements. Later it was used extensively in navigation and military operations. In the northern Song Dynasty it was introduced to the Arab world and
In their practice of alchemy, some ancient Chinese necromancers discovered that an explosion could be induced if certain kinds of ore and fuel were mixed together in the right proportion and heated, leading thus to the invention of gunpowder. The method of powder-making was introduced into the Arab world in the 12th century, and then into




