The only known surviving copy of the Chinese version is stored at the Biblioteca Nacional in Madrid. The title literally means “The Teachings of Christianity”, and thus the primary goal of the book was to propagate Christian teaching across the Philippine archipelago. The book consists of 38 leaves and 74 pages of text in Spanish, Tagalog transliterated into roman letters, and Tagalog in its original Tagalog Baybayin (Sulat Tagalog) script, under a woodcut of Saint Dominic, with the verso originally blank, although in contemporary versions bears the manuscript inscription, "Tassada en dos reales", signed Juan de Cuellar. After a syllabary comes the basic prayers: the Lord's Prayer, Hail Mary, Credo, and the Salve Regina. Following these are Articles of Faith, the Ten Commandments, Commandments of the Holy Church, Sacraments of the Holy Church, Seven Mortal Sins, Fourteen Works of Charity, the Confiteor and a brief Catechism. The book was printed on paper made from mulberry. The size of the volume, which is unbound, is 9⅛ by 7 inches, although individual leaves vary somewhat due to chipping. Some of the leaves have become separated from their complements, but enough remain in the original stitching to indicate that the book was originally made up in four gatherings, the first of twelve leaves, the second of ten, the third of ten, and the fourth of six. Although the book is of the size called quarto, the method of printing must have been page by page, so it is doubtful that each sheet was folded twice in the usual quarto manner, but more probable that it was printed four pages to a sheet of paper approximately 9⅛ by 14 inches, which was folded once. The volume was printed using the xylographic technique, printing each page of text from one hand carved woodblock. Vertical lines long the inner margins of some pages were made by the inked edge of the block, and the grain of the wood appears as striations throughout the printed areas.