Liu et al. (2018) report lower average F-scores on NER when reproducing the structure of <cite>Lample et al. (2016)</cite> , and on POS tagging when reproducing Ma and Hovy (2016) . Most literature compares results with others by citing the scores directly <cite>Lample et al., 2016</cite>) without re-implementing them under the same setting, resulting in less persuasiveness on the advantage of their models.