History: Old China

Ancestor worship is a major religious theme shared among all Chinese religions. Traditional Chinese culture, Taoism, Confucianism, and Chinese Buddhism all value filial piety, or a love and respect for one's parents and ancestors, as one of the most important virtues. Chinese people generally offer prayers and food for their ancestors, light incense and candles, and burn offerings of Joss paper. These activities are typically conducted at the site of ancestral graves or tombs, at an ancestral temple, or at a household shrine.
Islam in China dates to a mission in 651, 18 years after Muhammad's death. Muslims came to China for trade, dominating the import/export industry during the Song Dynasty. They became influential in government circles, including Zheng He, Lan Yu and Yeheidie'erding, who designed the Yuan Dynasty's capital, Khanbaliq. Nanjing became an important center of Islamic study. The Qing Dynasty waged war and genocide against Muslims in the Dungan revolt and Panthay Rebellion.
Judaism in China dates to as early as the 7th or 8th century CE. In the first half of the 20th century, tens of thousands of Jews from Europe arrived in Shanghai and Hong Kong during those cities' periods of economic expansion, seeking refuge from the Holocaust. Shanghai was notable for its volume of Jewish refugees, as it was the only port in the world to accept them without an entry visa.
Christianity in China has developed since at least the 7th century AD with the introduction of the Assyrian Church of the East. Christianity began to make significant inroads in China after the 16th century through Jesuit and later Protestant missionaries. The Taiping Rebellion was influenced to some degree by Christian teachings, and the Boxer Rebellion was in part a reaction against Christianity in China.