Series of the Four-categories was published by Commercial Publishing House During the period of the Republic of China which included a large-series of photocopy books.there were 504 traditional books（3100copies）being published in the first

second and third parts.But the publishing plan of the fourth and fifth parts were terminated for the outbreak of war.So investigation on the kind and the content of the books which were planned to be published in the fourth and fifth parts shall be done to get more details for history.