developed zinc cyclic di‐AMP nanoparticles (ZnCDA) for tumor‐targeted STING activation.[30a] ZnCDA was synthesized in two steps: first, the CDA‐loaded Zn phosphate core was generated via coordination polymerization of sodium phosphate, Zn(NO3)2, and CDA using a reverse microemulsion method. This evidence concerns the gene STING1 and neoplasm.