A Step‐by‐Step Multiple Stimuli‐Responsive Nanoplatform for Enhancing Combined Chemo‐Photodynamic Therapy

: A robust and smart protoporphyrin-based polymer nanoplatform, which is capable of successively recognizing the variation of biological signals and reacting with them in a dynamic mode, is successfully developed. It combines the chemotherapy and photodynamic therapy in a same system, leading to a high treatment outcome while a low adverse side effect of therapeutic agent.