History: Then And Now, China

It has features of monotheism in that Heaven is seen as an omnipotent entity, endowed with personality but no corporeal form. From the writings of Confucius, we find that Confucius himself believed that Heaven cannot be deceived, Heaven guides people's lives and maintains a personal relationship with them, and that Heaven gives tasks for people to fulfill to teach them righteousness (yi, 義). However, this faith system was not truly monotheistic since other lesser gods and spirits, which varied with locality, were also worshiped along with Shangdi. Still, variants such as Mohism approached high monotheism, teaching that the function of lesser gods and ancestral spirits is merely to carry out the will of Shangdi, which included observing "universal love" (jian'ai, 兼爱) and shunning fatalism.
Worship of Shangdi and Heaven in ancient China includes the erection of shrines, the last and greatest being the Temple of Heaven in Beijing, and the offering of prayers. The ruler of China in every Chinese dynasty would perform annual sacrificial rituals to Heaven, usually by slaughtering a bull as sacrifice. Although its popularity gradually diminished after the advent of Taoism and Buddhism, among other religions, its concepts remained in use throughout the pre-modern period and have been incorporated in later religions in China, including terminology used in Chinese Christianity.
Taoism is an indigenous religion of China and its beginnings are traditionally traced to the composition of Laozi's Tao Te Ching (The Book of Tao and Its Virtues) or to seminal works by Zhang Daoling. The philosophy of Taoism is centered on "the way"; an understanding of which can be likened to recognizing the true nature of the universe. Taoism in its unorganized form is also considered a folk religion of China. More secular derivatives of Taoist ideas include Feng Shui, Sun Tzu's Art of War, and acupuncture.
Buddhism in China was first introduced from Central Asia during the Han dynasty and became very popular among Chinese of all walks of life, embraced particularly by commoners, and sponsored by emperors in certain dynasties. Mahayana (Dacheng, 大乘) is the predominant form of Buddhism practiced in China, where it was largely Sinicized and later exported to Korea, Japan and Vietnam. Some subsets of Mahayana popular in China include Pure Land (Amidism) and Zen. Buddhism is the largest organized faith in China and the country has the most Buddhist adherents in the world. Many Chinese, however, identify themselves as both Taoist and Buddhist at the same time.