It's good that you have this idea. . But if you do it yourself, it's time-consuming and laborious. You might as well run errands for your brother. . Second, security risks. After all, you are not a professional blocker. . It's best to rent an archway. . Then I put my efforts into the theme of matching my brother's wedding decoration. . This is also innovation! ! ! If you really want to do it yourself. . . To prepare a semicircular iron ring. . Two round or square legs. . It's simple. . .