The 11-meridian system in the bamboo silk medicine books was inherited and developed by the later medical doctors as the theoretical framework of meridian

and formed a mature and complete 12-meridian system in Miraculous Pivot（《灵枢》）. In the evolution of the meridian system in early stage

the formation and development of the doctor’s understanding of the hand jueyin meridian is a controversial and crucial part of the whole process. Starting from the meridians in the bamboo silk medicine books

and compared with the hand jueyin pericardium meridian in Miraculous Pivot

the evolution process and theoretical development of the meridians in early stage were clarified.