Dear M You may find the following article of interest. http://qianfengdaoismuk.weebly.com/wu-liu-daoism-in-modern-china.html Master Yan Tianfang agreed for me to translate his work but does not want
The mind must still be ‘calmed’ before these methods work, regardless of lineage. However, Zhao Bichen considered his main masters to be two Ch’an Buddhist monks (who together passed on the Wu Liu Daoist lineage to him). Their input added the Ch’an method of ‘hua tou’ to the Daoist practice.