By means of field interview and information from ancient books, the author investigated the inheritance tracks and modern development difficulties of Neijiaquan in east Zhejiang, and drew the following conclusions: so far, there is a lack of historical evidence supporting the story that ZHANG San-feng created Neijiaquan, while the track that Neijiaquan was inherited from Shanxi to Wenzhou and then to Ningbo is clear, and the track that Neijiaquan develops up to this day in Ningbo is also clear; the heyday o...