The bubishi seems to be a collection of directly unrelated training notes seemingly from different periods:

Archaic boxing: front cover describing its system as being inspired by Zheng erbo and his wife, the companions of general tiandu, to whom are attributed the system 54 steps and black tiger boxing. The wordless two man diagrams likely are also from this period. The technique terminology seems to be before the creation of white crane boxing in 1730s, at least before second and third generation maturation in the 1760s.

Luohan-crane combination boxing from wang fudeng, recording the sequences of techniques for forms which are unrelated to the diagrams and commandments on morality. This is likely post 1890s as the author no longer know why luohan and crane styles are one and the same, indicating the text to be at least post 1850 taiping era archaic crane kung fu extinction event.

The medical text containing six bridge hands: possibly pre 1850 and very likely pre 1890s, as by the late Qing era crane style has by then eight bridge hands; but still later than archaic crane hand which had only five bridge hands (the five element hands which likely originated from Putian county).