Hao Ren actually thought he was rather creative too. Since the time vampires walked the earth and mail service was invented, guess no one actually thought of stuffing one's own bats into a express delivery package.
He took a short while to discuss the knick-knacks with Vivian. The plan was like this: Stuff the bats in the express delivery packages, used human's express delivery service to send them all across Eurasia, to anybody. Since the MDT could search for any locales on Earth in a jiffy, or at most to get it to hack into the delivery system... If the bats were to be delivered to somewhere without a person to receive it. It'll be up to them to escape the packaging to look for their targets.