The investigators design focus group courses (three times) for clinical nurses to understand their opinions and needs about the teaching materials of suicide risk identification and assessment. Also, the investigators examine the possibility of adding the interactive discussion group which suggested by group discussion. The investigators choose 6-8 nurses each time out of the study samples randomly and excluded who had already joined the focus group before. Location of the focus group is on the independent discussion room in hospital. Meanwhile, nurses who joined focus group will also be excluded in the later study samples (neither the experimental group nor the control group).