Differently, model-transfer based methods (Wu and Dredzea, 2019; Wu et al., 2020) focus on training a shared NER model on the labeled data in the source language with languageindependent features, such as cross-lingual word representations (Devlin et al., 2019), and then directly testing the model on the target language.
there are limitations in both labelprojection based methods and model-transfer based methods.