The most professional person needs continuous learning, accumulation, reflection and summary. You need to know enough about this industry, and at the same time you can look at this industry from a third perspective, which is both professional and easy to understand, and you can walk in and out. Such people can be regarded as professionals.
Secondly, it takes time to brew, aiming at the e-commerce industry. E-commerce started in recent ten years, and its operators are relatively young.
If it is library management, I personally think we can find some self-media personnel who do copywriting, or Dangdang, Amazon and the like.