[A preliminary discussion on the contents and value of and , the medical bamboo slips unearthed from Han tomb in Laoguanshan of Chengdu].

The 52 medical bamboo slips entitled () and (-) , unearthed from Han tomb in Laoguanshan, are the exclusive medical books concerning channels. is the first work bearing the term " heart dominating channel" , and the running pathways and manifestations of 12 channels. This book could be the major original sources of the 12-channel theories described in the () of () . While suggests the coexistence of the multi-channel systems at the time when the book was compiled and, together with the 12 "channel" , and 3 "branched collaterals" , these 2 books represent the original condition before the establishment of the mode of channel circulation in and is significant to explore the nature and origin of channel.