Results of cross-domain low-resource NER

The data on the horizontal axis represents the domain of the training set, and the data on the vertical axis represents the domain of the development set and the testing set, where "mix" represents the mixed data of the five domains, and "mix&en" represents the mixed data of 5 domains and the English dataset^[26] mentioned above. Thus, the data on the diagonal shows the performance of methods on monodomain NER task, and the other data shows the ability of methods on cross-domain NER task and multi-domain NER task