Unfortunately, it isn't that simple (though I wish it was). You see, since we manufacture in China and print the books there, it is easy to ship the books out of that country. Where it gets a lot more complicated is if someone wants to bring the comics to America (where I would sign them) and then attempt to return those same books back into China. The Chinese regulations are very sensitive to "printed" materials coming into their country. It is much easier to send plastic or metal pieces back and forth because they are not considered "printed material" that could have some political message. This is just one of many rules and regulations all of us have to deal with that print and/or manufacture in China.
And then there are the rules and regulations we need to meet when we ship out products into any other country outside of the place of origin.