The training expenses of unofficial institutions are quite uneven, ranging from thousands to more than 10 thousand. But I don't think it's necessary. Courses such as opening a shop and delivering goods are basically the same. You can go directly to Bili Bili or Baidu search video to learn, or go to idle fish to buy some cheap training courses to learn. More basic, you can also go directly to Amazon Seller University to see for yourself.

As for more advanced courses such as advertising training, Amazon's global store opening officers will have some paid training, ranging from hundreds to thousands.

As for complaints, those organizations rarely make it clear. Prevention of this kind of thing is greater than complaint. If you had a good understanding of the rules from the beginning, you wouldn't have reached the stage of complaining.