I have a ceramic pot, originally a planter for a bamboo plant, with this symbol on it. Being blue, a color of the sea, somehow I perceived it to be perhaps Japanese. Since I was not familiar with it--it appears that most Chinese symbols are similar to their letter-characters--I thought that it could be of European origin. It reminded me a bit of the Saint John's Arms, when this symbol is used in a circle.
Finally I saw the symbol on the cover of a book about Chinese spirituality. It was then easy to look up. There seems to be other Chinese good luck symbols, although this may be the main one. There are variations of it. I think some of these symbols mean different, but similar concepts. For example, "vigor," "good luck," "prosperity," or "good health." I believe that this Chinese good luck symbol has a certain energy to it, and that could apply to any non-Chinese person up to a point.
Wikipedia shows four symbols as being related in design or meaning--Camunian Rose, Saint John's Arms, Valknut, and at least the European version of the Swastika. Actually, this symbol is found all over the world; from India to the Mediterranean and beyond. Even the Aztecs used it. The original European version is, it appears, generally a round solar cross with for notches around it. The square version could have an ancient Saturnian-connection to it, but despite the Swastika being a potential link to ancient mystery schools moving westward over many centuries--and certainly part of world history in any case--we aren't really supposed to discuss it due to the twelve year Nazi period. I am
undecided about the existence of "mystery schools" in the ancient world
that tie in Phoencia-Cannan and the Druidic cultures of western Europe.