The knife attack on talk show host Albert Cheng King-hon left him within a centimetre of his life, he said last night. He said he was convinced the attack was meant to kill him, and suggested he might be forced to quit, fearing the men he described as killers could attack again. Cheng, 52, was attacked by two men wielding beef knives as he arrived for his morning show at Commercial Radio's headquarters in Kowloon Tong on August 19. He suffered six deep wounds to his limbs and underwent six hours of surgery. 'I definitely think these people were going after my life. I don't believe reports in the media that it was a big warning. 'If it was they wouldn't have chopped me so many times,' he said in an interview with RTHK. 'The doctors told me it was so close, one centimetre of difference and they would have touched my main blood vessel and I would have lost all my blood.' Asked whether he feared a second attempt on his life, Cheng, who is under police protection in Queen Elizabeth Hospital, said: 'Because I don't know who did this, it's my concern at the moment that unless they find the killers - if I can say that - that they may come back again. 'I have to consider not only my safety but my family's safety. I will have to sit down and discuss this with my family and friends,' he said. Cheng and his wife Lo Kam-sheng have three young sons. The TV and radio show host also gave a strong hint that he was considering his future in broadcasting. 'Before the handover I was asked by both the foreign and local press when I would stop talking. 'I remember saying then it would be when my life or personal safety was being threatened - now this has really happened.' Cheng described the attack as not only a personal assault on his outspoken views, but a blow against freedom of expression in general. 'This was regarding freedom of expression, definitely connected to my outspoken views and comments made on TV or radio. I have a clean personal life and I am financially independent. I don't owe anyone any money.' Mr Cheng said public support had given him strength to recover. He made special mention of senior officials who visited him 'even though we have had different opinions in the past'. He also expressed worries about making a full recovery. 'I'm worried that even after full recovery I may not have full movement in my right leg. There is severe nerve damage,' he said. Police and Cheng's bosses at Commercial Radio, where he is co-presenter of Teacup in a Storm, have offered a $4 million reward for information leading to the capture of the attackers.