I received a small padded envelope today from China. Inside is a small ziplock bag with a granulated substance - looks like a mixture, not granulated oud. I have no idea what it is or who sent it! I assume this has something to do with agarwood but I don’t know of anyone in China having my name and address, other than companies selling drone parts (which this clearly isn’t). Was this sent to me by someone here as a free sample or something?