You're welcome. Here are better pictures highlighting exactly what I mean by the Chinese magazine not having a spine as compared to the Yugoslavian magazine.
...and another picture of the spine area along with the two ribs at the bottom. Both magazines have only two ribs but note the location. The Chinese ribs also extend further to the front of the magazine, while the Yugo ribs are pretty much confined to the larger, flat area.
I just want to point something out here...there are magazines for sale from some distributors listed as either Chinese or Yugoslavian, but are actually neither and you must ask or read the ad carefully. If you are trying to keep your magazines as original as possible, be on the lookout for "Chugos" which are magazines made by combining Yugo and Chinese parts in an attempt to simply sell magazines.