There are two kinds of roast duck: closed roast duck and hanging roast duck, both of which are the best when they are freshly baked, and even the best vacuum-packed ones are not so delicious. If you really want to take some back, you can buy baked ones and take them away directly. If the weather is not too hot, it won't be bad for two days. It's the same when you go home and heat it in a microwave oven. If you want to give it away, it is recommended to buy vacuum-packed brands such as Quanjude and Cheap Shop.