If the Yalu down jacket only has a hangtag and no other logos or trademarks, it is difficult to judge whether the down jacket is genuine. Yalu is a well-known brand, and its products usually have obvious trademark logos. Without these logos, it is difficult to determine the authenticity of the down jacket.

If you want to confirm the authenticity of this down jacket, you can try to contact Yalu Company or a professional appraisal agency for verification. These institutions can provide you with reliable identification results by testing the materials, workmanship, trademarks, etc. of the down jacket.