Steam Chicken

Today I went to a Chinese restaurant with my hubby and mother in law. From what I know from my friends that at that restaurant the steam chicken is very famous. So we want try to eat that menu. And it is true , the chicken is nice , the smell is good. I think they put salt , garlic oil on the chicken and then wrap it with aluminium foil and steam it. But I am not sure how long they cooked it.