I now have an order business, this order has an address, some ordinary express parcels, and some cargo parcels (shippingParcel) I'm not sure what address, shippingParcel, parcels are, who is the entity and who is the value object. If the address is a Value Object, it should not be modifiable, but in our logic it is actually modifiable, so I'm not sure what it is, if it's an entity then it doesn't have a ref. The package is the same as the address, it is an array, but it is an entity elsewhere, only the package tracking number and reference are needed here.