The characters celebrate Mike and Gloria's first anniversary with Chinese food. Chinese food dishes with the same name are vastly different on the East and West coasts (for example, Lo Mein and Chow Mein are interchanged on each coast). Mike announces the dishes he got and what is served are the West coast versions (where the show was filmed) as opposed to the New York versions (where the show is set).
Gloria should have her hair in the perm she had worn through most of season one; Mike mentioning on season four's "Mike and Gloria Mix it Up" that she had it when they first met, which was shown on season eight's "Mike and Gloria Meet".