If the active creditor's right has exceeded the statute of limitations, it is also within the scope of offsetability, because although the active creditor's right has exceeded the statute of limitations, it is still legal and valid, but it only gives the other party the right to defend. , (3) The subject matter of the active creditor's right and the defendant's creditor's right are of the same type and quality. Under normal circumstances, only money and kinds of things can be offset. Specific items are not suitable for offset. However, if a subject matter of higher quality is used to offset a subject matter of lower quality, for the defendant creditor, his rights are not affected and should fall within the scope of offset. , (4) Passive claims are within the scope that can be offset. Some passive claims are within the scope that cannot be offset. Claims of a specific personal nature may not be offset, such as claims for alimony and child support. Obligations resulting from infringement shall not be offset, such as debts that cause personal injury to the other party, etc.