Mech-for-i commented that several of these pens were identical. I am not convinced, if only because the trim rings do not fall off the WingS 3001. But my latest 358 was interesting in that regard. The seller on eBay was hejing1314 and the listing title was
Luxury packaging Yiren 358 Fluorescent green Two nib packaging Fountain Pen New
You get a pen and a second nib/section unit. Previously I had always seen this used to include both a F and XF nib, but the seller did not actually say that, and both the nibs I got were marked EF. More interesting were the markings on the package. It had a big F and the rest was mostly Chinese. But it did include a picture of the nib, and that nib was marked WingS Super Quality.
I wanted to investigate further but the "luxury packaging" was what I call "adult proof packaging" consisting of three layers of clear plastic welded together with a "handle" on the top to hang the product up on a rack display. (And the color was hardly fluorescent but more like melted lemon lime sherbet -- though it was close to the photo in the listing, and perfectly acceptable to me as all I wanted was a pen to hold my beloved yellow-green inks such as Vert Pre.)
The package labeling was all on a piece of paper welded between the clear plastic layers. After a struggle I extracted that with only moderate crumpling. Hidden behind it was an instruction sheet. It was entirely in Chinese except for the picture of the nib, which carried the same Wing Sung markings in English. The actual nibs said "Yiren EF," the clip said "Yiren," and the waistband said "359." But most convincing was the fact that the trim rings were loose on both sections.
Lacking a second body, I have only tried one nib. It is very nice and similar to the other 358s -- quite fine and quite smooth. However, I can't really recommend the two-nib package in general because it costs more than two whole pens. The only reason I ordered it was because I could not find single pens in pale yellow-green. So I am fairly happy with mine, but thought I would report for those not seeking yellow-green. And because of the pen's identity crisis.