We operated a p-type point contact high purity germanium (PPCGe) detector (CDEX-1B, 1.008 kg) in the China Jinping Underground Laboratory (CJPL) for 500.3 days to search for neutrinoless double beta (0\nu\beta\beta) decay of ^{76}Ge. A total of 504.3 kg\cdotday effective exposure data was accumulated. The anti-coincidence and the multi/single-site event... Show more