Repetition blindness (RB) refers to the failure to detect the second occurrence of a repeated item in rapid serial visual presentation (RSVP). In two experiments using RSVP, the ability to report two critical characters was found to be impaired when these two characters were identical (Experiment 1) or similar by sharing one repeated component (Experiment 2), as opposed to when they were different characters with no common components. RB for the whole character occurred when the exposure duration was more than 50ms with one intervening character between the two critical characters (lag=1), whereas RB for subcharacter components was more evident at exposure durations shorter than 50ms with no intervening character (lag=0). These results provide support for the model of sublexical processing in Chinese character recognition.