Tang Shouqian, a famous ideologist in modern China, wrote Warnings in the 1880s. Warnings not only lays a foundation for Tang Shouqian’s status as a reform ideologist, but it also serves as a milestone in the history of Chinese modern thought. The academic community has studied Tang Shouqian and reform thoughts in modern China in line with the lithographic edition published in 1895. In fact, Warnings was republished again and again. Almost 10 versions of Warnings appeared within less than a decade, four of which were published by Tang Shouqian himself, or republished after his amendment. The table of contents and the system of Warnings, as well as their increase, decrease or revision, reflected Tang Shouqian’s reforming thoughts as well as his consideration of thhe social trends. The table of contents of the first block-printed edition was arranged in accordance with the thought of traditional learning, i.e., in line with the six political frameworks of personnel, revenue, rites, war, justice and public works. Nevertheless, the contents under old frameworks were new contents which reflected changes of that time as well as forward-looking thoughts and opinions on politics, military affairs and economic reforms. Tang Shouqian amended and supplemented Warnings three years later (in 1893), in which he reflected the hot topics that drew the attention of the academic circle before the First Sino-Japanese War as well as his overall understanding of the reform thought of “changing weapons and not changing ways”. Tang Shouqian increased or decreased the table of contents and adjusted the arrangement of the whole book to make it more concise, highlighting the reform opinions which reflected the trends of the time to a greater extent. The change of contents of Warnings reflects Tang Shouqian’s observation and consideration of the international situation, the trends of the times and the society as well as its development. In the manuscript edition of 1893, Tang Shouqian amended the contents of the 18 chapters in the first block-printed edition. He amended 32 chapters in the lithographic edition after the First Sino-Japanese War to different extents. The contents amended in the two editions mainly include the following three categories: the first category is error correction, i.e., correcting errors due to the limitations of objective conditions to provide solider factual basis for the treatise of Warnings. The second category is the author’s new knowledge, which enables the knowledge and thought in the book to keep pace with the trend of the times. The third category is the author’s improved thought and ideas as a result of his improvement in understanding the world, the society and things. The author put forward reform opinions which were more consistent with the times with regard to how to deal with international relations and reform.