Please google SCL and NSCL , then you should get some idea of va

Small cell lung cancer is very different from non small cell lung cancer, thus treatment options are very different, SCL is very sensitive to chemo, which is the best option. If it is NSCLC, then should get gene mutation such as EGFR or ALK test, it is not costly and can be easily get it done in most Big Chinese hospitals. If EGF positive, then targeted therapy such as Tarceva should help your dad for a few years if he responds to this drug well, there are second and third generation EGF inhibitors in the clinical. You can google Tarceva to get some idea how this drug works.