Following previous studies (Chang, 1995;Huang et al., 2007;Wu et al., 2010;Dong et al., 2016), we adopt confusion sets 21 and a language model to handle the taks for Chinese spelling error correction.
empirically, given two Chinese characters, c 1 and c 2 , we set 0.25 * (len(c 1 ) + len(c 2 )) as the threshold, η, where len(c) denotes the number of strokes for the Chinese character c. If the edit distance of two characters is more than a threshold η, we consider them not to be similar in shape.