This article investigates classifiers from the Han Dynasty to the Period of Wei and Jin Kingdoms and Northern and Southern Dynasties, especially the general classifiers "mei2" and "ge4". It is found that the two classifiers have been used as general classifiers as soon as they became to be classifiers from nouns; and they have been used mainly with the nouns that did not have specific classifiers. The general classifiers matured at the time when classifiers were emerging in Chinese. They also increased the scale of classifiers used and showed that the grammatical category of classifier has existed in Chinese since the Han Dynasty although there were not too many classifiers at that time. Motivation of classifiers used in Chinese is grammar not semantic.