https://www.worldcat.org/title/study-in-late-ching-conservatism-lao-nai-hsuan-1843-1921/oclc/16913929
https://www.ichi-ng.com/history/richard-wilhelm-1873-1930/
In 1911 he met one Lao Nai-hsuan, a Chinese sage and scholar. This sage was experienced in the old Chinese ways, especially in matters of the I Ching, and decided to teach them to Wilhelm. Wilhelm started the Confucius Society in Tsingtao and Lao Nai-hsuan was put in charge of it. His special enthusiasm for the I Ching was passed on to Wilhelm and seemingly for the first time the profound spiritual insights of China were shared with a European.
They began the translation of the I Ching in 1913 and finished it in 1921. Just as the last proofs were ready Lao Nai-hsuan died. He succeeded in passing on his life’s work to unite the East and West mystically. In 1923 the I Ching, or Book of Changes was published.