The exact time of the introduction of Buddhism intoChinais hard to be ascertained. At its early years after introduction, Buddhism did not have much influence.
It is said that in the year 2BC, Yi Cun, an emissary of Dayuezhi Kingdom (an ancient mid-Asian country established by a strong Chinese minority originally living in northern China and later moved to the west), arrived in Chang'an (today's Xi'an City), capital of China at the time. He dictated Buddhism to Doctor Jing Lu. And this is the first record about the introduction of Buddhism intoChina.
There is another saying that during the reign of the Indian King Asoka (272-226 BC), 18 Indians visited China's Xianyang City during the reign of Qin Emperor Shihuang (the first ever emperor of the Qin Dynasty, 246-210 BC, and therefore the first ever emperor of feudal China). In the year 250BC, King Asoka convoked the third conference and, after the conference, Dade was sent to spread Buddhism to other countries including China.