MYC and plasma cell myeloma: In order to further observe the impact of chemotherapy drugs on immunocompetent myeloma mouse models, we also intravenously injected vk*MYC cell line (vk12598) cells into C57BL/6J mice, followed by intraperitoneal administration of chemotherapeutic drugs or STING inhibitor (H‐151) three times per week for a duration of 2 weeks, beginning 2 weeks after cell injection.