 |
 |
 |
 |
 |
 |
|---|---|---|---|---|---|
| 3 | Deep UV-LED conference(SOC) | - | 2006.07.03 | Journalists and investors | Presentor from SOC |
| 2 | AC-LED lighting source conference | - | 2005.01.26 | Journalists and investors | - |
| 1 | First quarter management discussion | Hotel President | 2004.04.26 | Domestic investors | - |
