China, with a recorded history of more than 5,000 years, is one of the four ancient civilizations. From the time of the founding of Xia dynasty in the 21st century BC to the late Spring and Autumn period, with the Shang and Western Zhou dynasties in between, society was slavery based. From the time of the Warring States period of 475 BC to the early period of the Qing dynasty, with Qin, Western Han, Eastern Han, Three Kingdom, Western Jin, Eastern Jin, Southern and Northern dynasties, Sui, Tang, Five dynasties, Song, Liao, Jin, Yuan, and Ming in between, society was feudal. After the Opium War in 1840, China gradually turned into a semi-colonial and semi-feudal society as a result of imperialist invasion. In 1911, the 1911 Revolution, led by Sun Yat-sen, ended the monarchy and on October 1, 1949, the CPC, under the leadership of Mao Zedong, led the masses and established the People’s Republic of China.