Laozi, surname Li, name Er, word Dan, a word Boyang, or said possum Boyang, the late Spring and Autumn period, birth and death years are unknown, the birthplace is also more controversial, Historical records and other records Laozi was born in Chu or Chen. An ancient Chinese thinker, philosopher, litterateur and historian, the founder and main representative of the Taoist School, known as Laozhuang with Zhuangzi. Later, he was revered as the patriarch of Taoism and called Too Shang Laojun. In the Tang Dynasty, Li was regarded as the first ancestor. He has been listed as one of the world's cultural celebrities and one of the world's 100 historical celebrities.