“My Chinese is not good”, a heritage speaker involved in my linguistic study said with some discomfort, after finishing a Chinese reading task of the experiment. The time he spent on the task was almost twice the average, even slower than some non-heritage learners at a beginner level. However, he performed in a native-like way in listening and speaking tasks, in terms of both accuracy and reaction times. Heritage learners seem to have no problem with grammar but struggle with Chinese character recognition. They are bilinguals, but not biliterals.