THE Hong Kong owner of a Shenzhen toy factory which burnt down last year killing 84 workers is to go on trial in a theatre on Thursday. Lo Chiu-chuen, 49, will face fire safety and bribery charges. Shenzhen authorities have hired Longgang Theatre for the trial of Lo, director of Hong Kong Trico Industries Limited which supplied materials to Longgang's Zhili Handicraft Factory. Hong Kong factory manager Leung Kin-kwok, 40, and a Shenzhen manager Huang Guoguang, 60, accused of ignoring fire safety improvement advice and recruiting an unqualified electrician, and the electrician, Liu Guangwan, 28, will also appear at the two-day public trial. All have been in custody since the November 19 fire, which was caused by an electrical fault. Mr Lo, who went to the factory the day after the fire, was put under house arrest until January when he was formally detained. His family has not been allowed to see him since then. His wife, Lo Chan Tak-ngan, said yesterday that she and their two children, aged 13 and two, were worried about his health. ''I took the children to Shenzhen to see him twice in November and December. But since he was formally detained [in January], we have not been allowed to see him or talk to him on the phone. ''We just received three letters from him, asking me to send some money and medicine,'' she said. She said she would take the older daughter, Sheena, to Shenzhen tomorrow. Mrs Lo said: ''Sheena is not happy that her father is not at home. He used to take her out for dinner during the summer vacation. But now I do not know when he can come back to Hong Kong.'' Mrs Lo said her husband would not plead guilty, because it was not his fault. ''He is innocent. The Hong Kong management is only responsible for supplying materials, taking orders and giving technical instruction,'' she said. Some Hong Kong merchants who are friends of Lo and are concerned about the case will accompany Mrs Lo to Shenzhen. The fire, in which 84 people were killed and 46 injured, sparked concerns about fire safety standards of joint ventures. between Hong Kong and China on the mainland.