The time span from 220 BC to 220 AD is 440 years. This is calculated by adding the 220 years from 220 BC to 1 BC and the 220 years from AD 1 to 220 AD, since there is no year 0 in the transition from BC to AD.
400 BC is earlier than 220 BC
1227 BC, mongols ruled all of northern china
The Han dynasty ruled ancient China from 220 BC to 220 AD.
IN1260 TO1323 BC
220 BC
The watermill was invented in China during the Han dynasty (202 BC - 220 The watermill was invented in China during the Han dynasty (202 BC - 220
It was created in 25 bc and ended in 220 ad.
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Remembering that there was no year zero, it is 429 years.
It was invented in the Hellenistic era by Apollonius of Perga around 220 BC. However it has also been attributed to Hipparchus around 150 BC
426 years