It is so simple, just wash and dry the chicken and rub some salt all over the chicken. Before roasting, coat it with butter. After baking for 30 minutes at 180 degrees celcius, use a fork to poke some holes, turn the chicken over and roast for another 15 to 20 minutes and then turn over the chicken and roast for another 30 minutes or till it is crispy. During the last 15 minutes or so, turn the temperature to 200 degrees celcius and coat with butter again.
Instead of adding keropok to the roast chicken, I added some fried wantan skin.