A comic to celebrate the upcoming Chinese Mid-Autumn Festival. Since Princess Luna is the princess of the night and the one who is in charge of raising the moon, I think it is fitting to have her dress up as the Chinese moon goddess, Chang'e and having mooncakes.
Just to clear things up. The Bat Ponies in panel 2 are Luna's personal guards/servants not the diplomats. They are presenting the diplomats' gifts to her (Since Hasbro has not yet shown us any ponies from China, unless of course you count the shopkeeper that sold the Alicorn Amulet to Trixie).