Yunda express generally does not provide boxes for free
many express companies do not provide free packing boxes, and some of the following express outlets are contracted by individuals and do not provide packing box services. Good couriers will help you find boxes or provide paid packing boxes
if you need a box for express mail, you can choose:
self provided packing box
buy special packing box for express delivery
ask the receiver to help and use the packing box received by others
if there is no zygote, find a box by yourself.