ECNS, February 16 -- Pioneering songstress Zhang Lu passed away last month. Yesterday, her sons Derek Du and Tony Du held a memorial service for their late mother in Tuen Mun, decorating the venue as a garden which was Zhang's favorite when she was alive. Her husband, sons, future daughter-in-law, as well as her close friends Yao Li, Pan Di Hua, Ching Ting, Liu Yun and Leung Chiu Wei etc. all came to bid farewell...