This is the author accepted manuscript. The final version is available from taylor & Francis via the DOI in this recordThis article investigates British attitudes towards Qing China as a consequence of their early encounters from the Macartney embassy to the opium crisis. Examining this medium-term time span, to which previous scholarship has paid inadequate attention, shows the continuity and change in these attitudes through different historical contexts. With its focus on war-related discussions, this article reveals how the idea of war against the Chinese empire was developed and debated on the basis of these changing ideas. The First Anglo-Chinese War, to a great extent, could not have developed into the form and scale it did without these developments.