【明報專訊】YESTERDAY 25,000 people (5,400 according to police) marched to the Central Government Liaison Office demanding a thorough investigation into the mysterious death of Hunan activist Li Wangyang. The concern expressed by Hong Kong people over Li's death and the sea of candles lit up during this year's June 4 vigil point very clearly to the public's refusal to forget the June 4 incident and their indignation at the injustices perpetrated in mainland China.