 This notation form was called "jianzi pu" 〔減字譜〕 (literally "reduced notation") and it was a great advancement for recording qin pieces.It was so successful that from the Ming dynasty onwards, a great many qinpu 〔琴譜〕 (qin tablature collections) appeared, the most famous and useful being "Shenqi Mipu" (神奇秘譜, "lit.