Click the following for more information on this superb dharma from the Supreme and Unsurpassable Mahamudra of Liberation that enabled these disciples to see and realize the Rainbow Body State:
“I finally received the Highest Buddha-Dharma–The Xian Liang Great Perfection Dharma Initiation” article by H.E. Dharma King Ciren Gyatso about his experience.
“I Became Accomplished by Receiving the Xian Liang Great Perfection Dharma Initiation” article by H.E. Kaichu Rinpoche.
“Revealing the Truth” by Sri Zheng Hui: news article on book where author explains how she was able to receive this dharma and her experience.