404. That’s an error.

The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Ftripitaka.cbeta.org%2FT54n2123&title=T54n2123+%E8%AB%B8%E7%B6%93%E8%A6%81%E9%9B%86 was not found on this server. That’s all we know.