The resource domain can proxy and cache your static contents, at the same time it denies request to dynamic contents.
Resource domain has valid China ICP license and able to delivers your static content to global including mainland China directly. You are recommended to replace the URL of your static contents with that of the resource domain on your website. This serves well for those of whom do not have a valid ICP license in China. It can reduce static content loading time and eventually boost the entire lifecycle user experience.
Customer who has valid ICP license can also setup their domain as resource domain.
This feature is scheduled to release in Q3 2018.