Hi @quodangpham ,
I checked your site an your banner is appearing. I think what is happening is that cache needs to be cleared on both your site and in your browser.
Anytime, you move/redirect an asset on a WP site you will need to clear cache to ensure that all of the changes show up appropriately. If you find that you are not seeing changes that you're sure you published, try clearing cache first.
Hope this helps,