A seal is an historical witness,a symbol of power as well as an important cultural relic for the study of history.Seeing those seals made of various materials,it is very natural to wonder how Jamyang(vjamdbyangs)living Buddhas in past dynasties developed A seal is an historical witness, a symbol of power as well as an important cultural relic for the study of history.Seeing those seals made of various materials, it is very natural to wonder how Jamyang (vjamdbyangs) living Buddhas in past dynasties developed