Communication of nuclear data progress

This is the 30th issue of Communication of Nuclear Data Progress (CNDP), in which the progress and achievements in nuclear data field in China during 2004 are carried. It includes the evaluations and model calculations of neutron data for n+31P, 59Co, 92-106Mo, Nat-116Cd, 233U and the covariance data evaluation of experimental data for 27Al, update the decay data for radionuclide 7Be. Some results of studies for nuclear evaluation tool and model are also included in this issue, i.e. reaction mechanism studies of 5He, a new method of evaluating the discrepant data, linear fit of correlative data by least squared method et al. (authors)