The Hua Tou (話頭) Method.

‘These facts demonstrate that master Dahui did not refer to his own enlightening method as either a ‘hua tou’, or indeed a ‘kan hua’, and did not view what he was doing as some thing ‘new’ and ‘original’. In fact, the impression one gets from Dahui is that he is following an older tradition that has been forgotten by those around him.’