"Spring and Autumn Annals" records that "a satellite entered the Beidou" in 6 13 BC, which is recognized as the exact record of the first Halley's comet in the world, more than 600 years earlier than Europe;
In the Spring and Autumn Period, the calendar in China has formed its own fixed system, basically establishing the principle of seven leaps in nineteen years, which is earlier than that in the west 160 years.
During the Warring States Period, the world's earliest literary work "Shi Gan Jing" came out.
Qin and Han dynasties:
When Emperor Wu of the Han Dynasty, astronomers worked out China's first relatively complete almanac "taichu calendar";
The record of sunspots in the Western Han Dynasty is recognized as the earliest sunspot record.
Zhang Heng, a scientist in the Eastern Han Dynasty, made the earliest scientific explanation for the solar eclipse. The seismograph he invented and manufactured was earlier than that made by Europeans 1700 years ago.