This is a shanzhai version of ZPar, which perform constituent parsing with a very fast speed, using the shift-reduce framework and some implementation tricks.
More implementaion details could be found on the paper: Muhua Zhu, Yue Zhang, Wenliang Chen, Min Zhang, Jingbo Zhu: Fast and Accurate Shift-Reduce Constituent Parsing. ACL (1) 2013: 434-443