Recent studies showed that the dysregulated activation of the JAK/STAT pathway, which leads to the prolonged release of IFN-γ, is a significant contributor to the resistance to immune checkpoint inhibitors in cancer immunotherapy. Preclinical and clinical studies have demonstrated that the combination of JAK inhibitors with PD-1 immunotherapy can reverse or delay onset of immunotherapy resistance by modulating the JAK/STAT pathway in Hodgkin's lymphoma and non - small cell lung cancer (NSCLC). SHR0302, being a highly selective JAK1 inhibitor, has shown excellent clinical benefits by effectively inhibiting the JAK/STAT pathway, leading to its approval for the treatment of Ankylosing Spondylitis in China. Preclinical studies also show that the combination of SHR0302 and PD-L1 inhibitor has synergistic potentials for anti-tumor effect in resistant to-immune checkpoint blockade patients. Thus, we conducted a phase 2 clinical trial evaluating SHR0302 combined with PD1/PD-L1 inhibitors as treatment-naïve or acquired resistant to first-line checkpoint inhibitor resistant NSCLC patients.