The Chinese bamboo rod is the oldest decimal calculator
On April 23, the Guinness Book of Records recognized a set of Chinese bamboo sticks that existed for more than 2,300 years, the world's oldest decimal calculator.Ancient Sword War era remains intact after 2300 years
The silver sword from the Warring States period remained bright after more than 2,300 years buried in a deep grave.China found the sword of the Warring States period
In eastern China, Jiangxi Province, people have found an ancient sword that experts claim is the sword of the Warring States period (from 475 BC to 221 BC).