The movement names are remarkably similar, with minor variations due to the use of synonyms or homonyms accounting for most name variations. This is much more obvious in Chinese than translations into other languages. The number of the named movements often varies, and there may be inserted repetitions, transitions or even a whole section here or deletions there. These represent the emphasis, additions, or evolutionary contributions of teachers across time, however, the underlying form framework remains intact. This commonality is likely because all styles were based on the 66-movement Thirteen Postures form passed down within the Chen family from Chen Wangting. It might be more accurate to call the "styles" of taijiquan, "sub-styles,” since they retain so much in common.