Revert "better demo url"

This reverts commit e49b6abf03bfff4e62f3ae8e9ff883dc327f6141.
Revert "update"

This reverts commit 7c0b9ab14ae7249fcfcb76d851d0c38e216aecb3.
Revert "Revert "better demo url""

This reverts commit e7cfd466c62bf7e6e4c350e72ed8561f86a4667b.