1, Compass (Sina), the earliest recorded Sina originated in the Warring States period, and its actual age should be recorded insufficiently. Its inventor is also hard to find (probably from a person's life).

2. The Sui and Tang Dynasties invented gunpowder, which originated from alchemy, and the inventor was unknown. The earliest and relatively complete record comes from Sun Simiao's Single Crystal Sulfur Law.

3. Paper-making, Eastern Han Dynasty (102 to 105), inventor: Cai Lun, invented in Luoyang.

4. Movable type printing, which started with block printing in Sui Dynasty, was developed and perfected by Song Renzong "Bi Sheng" in Qing Dynasty (A.D.1041-kloc-0/048), resulting in movable type printing.

The historical influence of the four great inventions

1. The invention of papermaking provided economical and convenient writing materials for human beings and set off a revolution of human writing carrier.

The appearance of printing accelerated the spread of culture and changed the situation that only the upper class in Europe can study.

The application of compass in navigation provides important conditions for European navigators to travel around the world and discover the new continent of America.

4. The use of gunpowder weapons changed the way of fighting, helped the European bourgeoisie destroy the feudal fortress and accelerated the historical process of Europe.