Based on the Kyujangga edition of the Calendrical Studies of the Chongzhen Reign housed in the Seoul National University, this paper investigates the contents of the Calendrical Studies of the Chongzhen Reign. It also compares the front materials of the Calendrical Studies of the Chongzhen Reign and Xiyang xinfalishu (Calendrical Treatises in Accordance with the New Western Methods) in order to understand how Adam Schall von Bell manipulated the front materials to associate the calendrical reform with Christianity. The differences of the front materials in these two collactaneas indicate how the form of a book changes its meaning to the reader.