Dhyāna in Buddhism the Japanese Rinzai school, but it also occurs in other schools or branches of Zen depending on the teaching line. The Zen student's mastery of a given kōan is presented to the teacher in a private interview (referred to in Japanese as "dokusan" (独参), "daisan" (代参), or "sanzen" (参禅)). While there is no unique answer to a kōan, practitioners are expected to demonstrate their understanding of the kōan and of Zen through their responses. The teacher may approve or disapprove of the answer and guide the student in the right direction. The interaction with a Zen teacher is central in
History of Buddhism in India the founder of Zen Buddhism in China. In 580, Indian monk Vinītaruci travelled to Vietnam. This, then, would be the first appearance of Vietnamese Zen, or Thien Buddhism. Padmasambhava, in Sanskrit meaning ""lotus-born"", is said to have brought Tantric Buddhism to Tibet in the 8th century. In Bhutan and Tibet he is better known as "Guru Rinpoche" (""Precious Master"") where followers of the Nyingma school regard him as the second Buddha. Śāntarakṣita, abbot of Nālanda and founder of the Yogacara-Madhyamaka is said to have helped Padmasambhava establish Buddhism in Tibet. Indian monk Atiśa, holder of the "mind training" (Tib. lojong)