Short answers, pulled from the story.
Humanistic Buddhism is a movement that integrates Buddhist practices into everyday life based on Sakyamuni Buddha achieving Buddhahood while bound in an earthly form. The term was first used by Taixu, a Buddhist modernist activist and thinker, in early 20th century China as Buddhism for Human Life before evolving into its current name.
Yin Shun and other disciples brought both terms to Taiwan following the Nationalist government defeat during the Chinese Civil War by the Chinese Communist Party. This transfer occurred after the war when the movement gained prominence among religious leaders originally from China.
The Four Heavenly Kings of Taiwanese Buddhism are Hsing Yun, Sheng-yen, Wei Chueh, and Cheng Yen. These four figures collectively head the Four Great Mountains or monasteries of Taiwanese Buddhism and Buddhist new religious movements namely Fo Guang Shan Dharma Drum Mountain Chung Tai Shan and Tzu Chi.
Humanistic Buddhism addresses gender roles through tensions between traditional views and modern organizational practices regarding women's positions. As of 1998 when 136 women from a variety of Buddhist traditions were ordained into the Fo Guang Shan tradition in China, Buddhist nuns have been gaining a place despite conservative perspectives held by Hsing Yun.