The USA doesn't allow Moon Cake Products to travel because of the egg yolk; that's why they confiscate them at the airport when people try to carry it with them. I think shipping en masse is okay, but not individual packages. I could be wrong,
The best Moon Cakes here in Kaiping comes from the local bakery ... black bean paste, no egg for just 2 RMB each. Personally, I think expensive Moon Cakes are a rip-off. It's a marketing gimmick just like Valentine's Day [ chocolates ]. Everybody feels that they have to buy it. Here, employees are expecting boxes from their employers and the latter has to buy the best ... in order to put forth a 'good face'.