Papermaking was invented in China during the Han Dynasty (206 BC - 220 AD) and is considered one of the Four Great Inventions of China.

Zhang Heng (78-139 AD) was a Chinese astronomer and mathematician who developed the first accurate calendar in China, known as the Taichu Calendar.

The rudder was invented in China during the Han Dynasty (206 BC - 220 AD) and allowed for the construction of large ships and bridges.

Laozi (6th century BC) was a Chinese philosopher who developed the concept of yin and yang, which is a fundamental principle in Chinese philosophy and medicine.

The abacus is an ancient Chinese invention used to calculate mathematical problems. It consists of a frame with beads that are moved to perform calculations.

Su Song (1020-1101 AD) was a Chinese inventor who created the first mechanical clock, known as the Water Clock.

The anemometer is an ancient Chinese invention used to measure the direction of the wind. It consists of a rotating vane that is attached to a pointer.

Wang Shuhe (1016-1072 AD) was a Chinese physician who developed the first smallpox vaccine.

The sundial is an ancient Chinese invention used to measure the time. It consists of a stick or rod that casts a shadow on a marked surface.

Liu Hui (3rd century AD) was a Chinese mathematician who developed the first proof of the Pythagorean theorem.

The odometer is an ancient Chinese invention used to measure the distance. It consists of a wheel that is attached to a counting mechanism.

Wei Boyang (2nd century AD) was a Chinese inventor who created the first gunpowder.

The compass is an ancient Chinese invention used to navigate at sea. It consists of a magnetized needle that points to the Earth's magnetic north pole.

Gan De (4th century BC) was a Chinese astronomer who developed the first star chart.

The printing press is an ancient Chinese invention used to print books and documents. It consists of a movable type that is inked and pressed onto paper.