I found an interesting Quanpu of Chachui on a Chinese PM forum.
This Quanpu is slightly different in the moves and in the usage of terms. The style, according to the poster, is a different branch of Mantis called JingShou Tanglang (Exquisite Hand praying mantis) which is a family style not quite available to the public. BTW, the exact history of it is unclear at this point. I think the story behind the style would be even more interesting. The most important thing about this Quanpu is that it uses terms that are almost identical to old style Tanglang Quanpu (ie mouth locking, double provoking, etc... ). I am sure if it is compared to the modern style, there would be more "enlightening" discovery.
Mantis108