Bountiful archival material of the Kwan Ying Do system still exists. Archived material that is not included on this website consists of a comprehensive list of demo videos from the late seventies through 2007, over thirty hours of audio from Master Ong's monthly meetings and hundreds of pages of notes from Master Ong's classes. These items will be made available to Kwan Ying Do students who contact us at info@kwanyingdo.com requesting this information.