Many features of basic-level category vocabulary (BLCV) play an important role in international Chinese language teaching, and one of them is preference for BLCV acquisition which has yet remained to be confirmed. In this paper, a written language corpus of Chinese pupils is established, and the usage of the condition and quality BLCV is analyzed. It is found that 212 of 312 those BLCV are used by Chinese pupils in Grade One, the rest 100 are used during the whole primary school years . Besides, learners keep enlarging other vocabularies with their increasing Chinese proficiencies, and thus cause a dilution effect on BLCV. These results show that language learners have grasped most BLCV when they start to use written language, indicating an obvious preference for BLCV acquisition.
