Well, it's fairly obvious:
The first one shows that you should always throw your boomerang from the southwest - this one seems to be a bit of an interloper in the context of the next three pictures. It probably arose from a mistranslation, given that the word for boomerang and magnifying glass is only one character out in Chinese.
The second shows the correct size of bike clip to wrap round your magnifying glass.
The third shows the danger of bike clip misalignment should it be incorrectly fitted round the magnifying glass.
The fourth shows a robot spot welding the now correctly aligned bike clip into position.
The end result - an attractive cycling-related gift for a visually impaired friend.
John