This is a process of exhibition set-up. For me, It is extremely hard to set all kinds of electronic cables of iPad. Anyway, It is a good opportunity to practice. Special thanks to Jonathan’s help.
At this stage, I used nails to fix these old frames on the wall instead of strong tape. At the same time, more exact layout to be confirmed. Jonathan taught me how to choose a more clever position to fix nail, which makes old frame have a suitable angle.