A critical article by Harmanjit Singh, which describes the Vipassana meditation retreats, and discusses pitfalls and shortcomings of the technique and rules.
One of the leaders in the Confucian counterattack on Buddhism was the classical prose stylist and poet Han Yu (768-824 CE), who in 819 CE composed this vitriolic polemic attacking Buddhism. A champion of rationalism, Han Yu wished to suppress Daoism as well as Buddhism.