1, get a comparison.
The genuine collar is thicker, so it can hold. Fake ones can't stand up, or they don't feel that way after standing up. Just walk twice and it will collapse.
2. Contrast of chest marks.
Authentic badges are usually sewn separately, and the embroidery is more exquisite, while fake badges are generally directly embroidered.
3. The difference between marks.
The tag of the genuine Taiping bird is printed with a pale yellow edge with a white background inside, while the fake bird is all white.