For some reasons, my car has been posted for only couple second in a selling page. Once I went to a home page I could't find the post and it will also disappear in the selling page. There is no error information. Thanks.
Welcome to the community, @ivanchang
I took a look at your account, and it appears that there is 1 car ad currently posted. The additional posts were removed as they were all duplicates of the first post. Keep in mind that duplicates are against the posting rules, so be sure to only have 1 post for each unique item