Kuan-yin is known in Sanskrit as Avalokiteśvara, which originally was transliterated as "Ah-fu-lu-chih-ti-shih-fa-lo", from which such forms as Kuan-shih-yin, Shih-yin, and Kuan-tzu-tzai ultimately derive. Kuan-yin represents the Bodhisattva of the Ten Stages in Mahāyāna Buddhism. Belief in Kuan-yin originated in India and spread to China and elsewhere, being divided into the three forms of Sūtrayana, Tantrayāna, and Sinified. The image of Kuan-yin in the "Universal Gate Chapter of the Kuan-yin Bodhisattva" in The (Sublime Dharma of the) Lotus Sutra in the National Palace Museum collection belongs to the Sūtrayana system. The Kuan-yin Sutra represents a classic example of the Tantrayāna type, its Kuan-yin image belonging to the esoteric Kuan-yin form. The sinification of Kuan-yin belief was much influenced by popular literature, giving rise to various forms with incarnations having as many as 32 or 33 heads.