For decades, Spam has been a staple in Hawaiian cooking, a phenomenon dating back to its introduction during World War II.

FILE - In this Jan. 10, 2017, file photo, a man smokes outside a McDonald's restaurant in Beijing, China. McDonalds is selling a sandwich made of Spam topped with crushed Oreo cookies Monday, Dec. 21, 2020 in China in an attention-grabbing move that has raised eyebrows. (AP Photo/Ng Han Guan, File)BEIJING – McDonald’s is selling a sandwich made of Spam topped with crushed Oreo cookies Monday in China in an attention-grabbing move that has raised eyebrows. The sandwich is made of two slices of Spam, a product of Hormel Foods LLC, and Mondelez International's Oreo cookies, topped with mayonnaise. “When you hate someone but have to invite him to dinner, you can ask him to eat McDonald’s Oreo lunchmeat burger,” said a separate comment on Sina Weibo.