I want to take my folding bicycle on board the plane from Guangzhou airport to Pakistan.
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You could transport your folding bicycle as checked baggage, not as carry on, but would likely be charged a fee. While the weight is within the usual allowance for baggage, its dimensions would probably exceed airline restrictions.
Your bike (or example), the Anchor, measures 22” x 29” x 12” folded and weighs 30 pounds. Generally, airlines do allow such items, but usually require they be bagged or boxed (and limit liability as a condition).
The only way to know for certain whether you can, and any fees, is to contact the airline.