In this article, adult English speakers' comprehension of count mass classifiers in L2 Chinese is reported. Both English and Chinese have a conceptual way in which count-mass distinction is made. 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 empirical study show that the count-mass distinction is honoured in early stages of L2 acquisition, supporting a theory held by Soja, Carey, and Spelke (1991) that count-mass distinction is available in early grammars. They also suggest that the predominant use of the general classifier 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. They caution that the target-like performance and the assumed underlying target grammars are not necessarily equivalent, a theory in SLA development proposed by Myles (2004) and Hawkins and Hattori (2006).