The most direct manifestation of hidden ads is that the number of ads seen before and after logging in to the account is different. There are several reasons why ads are hidden:

1. The advertiser set the "transaction party limit" when publishing the advertisement
   
   • When the transaction party does not meet the trading conditions you set, the transaction party will not be able to see your advertisement.
   • When you check not to trade with other advertisers, other advertisers will not be able to see your ads after logging in to their account.
   • When you check Require the other party to pass advanced authentication and real-name authentication, users who do not meet the conditions can see your advertisement, but cannot purchase directly. The other party needs to complete relevant authentication before purchasing.
2. Add blacklist:
   • Add advertisers or users who do not want to trade to the blacklist, and the added users cannot see your ads after logging in to their account.
   • Adding method: If the other party is an advertiser and has an advertisement online, find the corresponding advertiser in the advertisement list, click the advertiser's nickname to enter the advertiser's "personal information page", and click "Block this user" at the bottom right of the page. After blocking, your ads will not be shown to the other party; if a user blocks you, your advertising information will not be shown to the user.
3. Actively remove the advertisements, and the advertisement list will directly hide the advertisement information.
4. If the webpage is closed or the login fails, the advertisement will be hidden in the list.
5. After the advertisement is sold out, it will be automatically removed. At this time, the advertisement will be hidden on the page.
6. When a buy-in advertisement is released, there are 5 uncompleted orders for the advertisement, and the advertisement is automatically hidden in the list and is effective for all users; when the advertisement is completed to 2, the hiding of the advertisement is released, and the ranking of the advertisement in the advertisement list is not affected.
7. When a sold advertisement is released, 50 uncompleted orders of the advertisement will be automatically hidden in the list, which is effective for all users; when the number of advertisements reaches 40, the hiding of the advertisement will be cancelled, and the ranking of the advertisement will not be affected.