Mozi criticized the Confucians of his own time for not following the teachings of Confucius. By the time of the later Han Dynasty, however, under the influence of Xunzi, the Chinese concept of heaven and Confucianism itself had become mostly naturalistic, though some Confucians argued that Heaven was where ancestors reside. Worship of heaven in China continued with 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 two healthy bulls as a sacrifice.