Short answers, pulled from the story.
Yin Shun (1906-2005) was a Chinese Buddhist monk and Madhyamaka scholar who is considered one of the most influential figures in Taiwanese Buddhism. His development of Humanistic Buddhism and his mentorship of leaders like Cheng Yen, Sheng-yen, and Hsing Yun shaped the direction of modern Buddhist practice and humanitarian work in Taiwan.
Yin Shun was ordained on the 11th of October 1930 at Fuzhun Monastery, when the abbot Master Qingnian shaved his head and gave him the Dharma name Yin Shun. Before ordination, he had explored Confucianism, Taoism, and Christianity before finding Buddhism.
Yin Shun met Cheng Yen in February 1963 in Taipei, when she was brought to his residence after being rejected from a novitiate. During a rainstorm that stranded her, she asked to become his disciple and he consented, quickly giving her the name Cheng Yen so she could register before the novitiate closed. Yin Shun later supported Cheng Yen's work by transferring the monetary offerings made to him by his followers to fund the construction of Hualien Tzu Chi Hospital.
Humanistic Buddhism, also called human-realm Buddhism, is a philosophy that places ordinary human life at the center of Buddhist practice, emphasizing engagement with the world over withdrawal from it. Yin Shun's research helped bring forth this ideal, and it became a leading mainstream Buddhist philosophy studied and practiced by many.
Yin Shun produced over fifty works in Chinese Mandarin covering many thousands of pages. English translations include The Way To Buddhahood (Wisdom Books, 1998), A Sixty-Year Spiritual Voyage on the Ocean of Dharma (2009), and An Investigation into Emptiness (2017). Translation of his remaining Chinese works was still in progress at the time of his death.
Yin Shun died on the 4th of June 2005 at Hualien Tzu Chi Hospital at the age of 99, after suffering complications from pulmonary tuberculosis that dated back to 1954. His funeral at Fu Yan Vihara in Hsinchu lasted eight days and was attended by Taiwanese President Chen Shui-bian, Premier Frank Hsieh, and monastics from around the world; he was cremated on the 10th of June 2005.