I want to take my folding bicycle on board the plane from Guangzhou airport to Pakistan.
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.