Explore the efficacy and safety of the treatment of Endostar continuous intravenous injection pump combined GP（gemcitabine+cisplatin） scheme for first-line advanced non small cell lung cancer and maintenance treatment.~main objectives: PFS (progression-free survival) the secondary goal: ORR (overall response rate), DCR (disease control rate) and OS（overall survival）
Explore the efficacy and safety of the treatment of Endostar continuous intravenous injection pump combined GP（gemcitabine+cisplatin） scheme for first-line advanced non small cell lung cancer and maintenance treatment.