I've got no reason to believe they're doing anything dangerous. I found this piece which indicates that they did a review in the wake of Fukushima. Sounds like things were adequate but they also found things to improve. Do you have reason to believe China is not taking safety seriously in there nuclear energy program?

Following Fukushima, however, Beijing immediately suspended approval of all new nuclear power projects while it undertook a comprehensive safety review of existing and under-construction nuclear power plants, as well as research reactors and fuel cycle facilities, and developed its Twelfth Five Year Plan for Nuclear Safety. In June 2012, after gaining approval of the State Council in principle, the National Nuclear Safety Administration released drafts of the Nuclear Safety Plan (Chinese here) and the “Report on Safety Inspection of National Civilian Nuclear Facilities” (Chinese here) for public comment.

As discussed in the Safety Inspection report, the safety inspection took over 9 months and covered 11 areas of safety, including site selection and external event evaluation; flood and earthquake resistance capacity; extreme natural disaster prevention and protection; electricity blackouts and emergency plans; severe accident prevention and mitigation; environmental monitoring systems; and emergency response system effectiveness.

The report concluded that operating reactors “basically fulfill” China’s nuclear safety laws and regulations and the International Atomic Energy Agency’s most recent standards, that they have the capacity to respond to design-basis accidents and severe accidents, and that safety risks are under control. However, in spite of these conclusions, the inspection report and nuclear safety plan also identified areas for improvement. In particular, the nuclear safety plan lays out short- (by the end of 2012), mid- (by the end of 2013) and long-term (by 2015) tasks to strengthen safety for operating and under-construction plants, research reactors and fuel cycle facilities.

China moves to strengthen nuclear safety standards and moderate the pace of its nuclear power development