Ng Hung, 76, is happy that he can continue working while he is still able.“I want to make good use of my time,” he says.The septuagenarian, who has been in the food industry for much of his life, now practises his craft at a frozen food production line set up recently in Fo Tan.“I do a five-hour shift for four to five days a week,” Ng says.His colleague, Chan Kin-wai, meanwhile, has decided he can dedicate a few more hours for cutting and processing meat at the unit, which was set up by a…