This paper reports on an empirical study of the comprehension of count mass classifiers in L2 Chinese by two groups of adult English speakers. In English, count-mass distinction is reflected at the level of the noun, whereas in Chinese it is defined according to classifiers (Cheng and Sybesma 1998). The results of the study cohere with studies in L1 acquisition that the count mass distinction is honoured in early stages of acquisition. They also suggest that the predominant use of the general classifiers ge does not require it to be denoted to a particular type of nouns. There are developmental differences in the interpretation of correct classifier use which is probably due to lexical learning. Implications of these findings are discussed in relation to the parameter-resetting theories in SLA.