This mantra is especially related to the 4-armed Shadakshari sort of Avalokiteśvara. The Dalai Lama is claimed being an incarnation of Avalokiteshvara, and And so the mantra is particularly revered by his devotees. The Chinese translation is 真言; zhenyan; 'real phrases', the Japanese on'yomi reading with the Chinese getting shingon https://davea851ggj0.estate-blog.com/30529565/top-guidelines-of-mantra