As we observe on T that the average pinyin word length is 5.24, then typo rate in the experiment of (Zheng et al., 2011a) can be roughly estimated as: 775 + 85 × 2 11968 × 5.24 = 1.51%, which is similar to the conclusion on English.
we generate corpora from D with typo rate of 0% (0-P), 2% (2-P), and 5% (5-P) to evaluate the system.