Hsing Yun (; 19 August 1927 – 5 February 2023) was a Chinese Buddhist monk, teacher, and philanthropist based in Taiwan. He was the founder of the Fo Guang Shan Buddhist monastic order as well as the layperson-based Buddha's Light International Association. Hsing Yun was considered a major proponent of Humanistic Buddhism and one of the most influential teachers of modern Taiwanese Buddhism. In Taiwan, he was popularly referred to as one of the "Four Heavenly Kings" of Taiwanese Buddhism, along with his contemporaries: Master Sheng-yen of Dharma Drum Mountain, Master Cheng Yen of Tzu Chi and Master Wei Chueh of Chung Tai Shan.
Hsing Yun was born Lee Kuo-shen (pinyin: Lǐ Guóshēn) in 1927 in Jiangdu village (modern day Yangzhou), Kiangsu (Jiangsu) Province in the Republic of China. Hsing Yun's first exposure to Buddhism came from his grandmother, a practicing Buddhist and meditator. In 1938 he entered the monastic life at the age of 12, ordaining as a novice at Qixia Temple under Zhikai, where he received the novice name Jinjue. He received the upasampadā vinaya precepts under Ruoshun at the same temple in 1941, receiving the dharma name Wuche.
Shortly after taking the full precepts, Hsing Yun was first inspired by Buddhist modernism in 1945 while studying at Jiaoshan Buddhist College. There he learned about Buddhist teacher Taixu's calls for reform in Buddhism and the Sangha. At a certain point, he adopted the name "Hsing Yun", literally meaning "nebula" in Chinese, to reflect his new philosophy. He fled mainland China to Taiwan in 1949 following the communist victory in the civil war but was arrested along with several other Buddhist monastics. Hsing Yun and the others were released after 23 days, and he then spent the next several years developing a large following and founding numerous temples. In 1966, Hsing Yun bought some land in Kaohsiung and started building a large monastery. After partial completion, the temple opened in 1967 and would later become the headquarters of the Fo Guang Shan Buddhist organization.