How did technological developments take place in the song dynasty?

Technological developments that took place in the Song Dynasty were the magnetic compass, the printing press, and the gunpowder.

They developed the magnetic compass for navigation. It helped ships travel great distances with no land in sight.

The printing press began in Tang China and improved on Song Dynasty. Printing later spread around the world, revolutionizing learning, communications, and connections.

Gunpowder was a Chinese innovation.  Firstly, it was used in Tang Dynasty for fireworks, and then by Song armies in rockets, grenades, etc. This development transformed the way of wars.

These technological inventions influenced the course of world history.