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Ultimately, the answer is simple: it is most likely a set of hand exercise or stress-relief balls, possibly a modified or homemade version of traditional Baoding balls, connected with a string for convenience or storage.
What once seemed strange or puzzling turns out to be something practical and familiar—just seen from an unfamiliar perspective.
And as with many viral mysteries online, the real lesson is not about the object itself, but about how easily curiosity can turn everyday items into global puzzles.
In the end, not everything mysterious is complicated… sometimes it’s just something simple seen in a different way.