New concept Olympic mathematics series. The Guide to Competition Mathematics in Senior Four Schools (Detailed Explanation and Upgrade Edition) (hereinafter referred to as the Guide) was revised from the Guide to Mathematical Thinking Training, and together with the textbook Competition Mathematics in Senior Four Schools, it constitutes the "New Concept Olympic Mathematics Series". Guidance refers to Gaussian guidance, the full name is "Gaussian school competition mathematics guidance", hereinafter referred to as guidance.