Article 12 Where there are two or more sureties for one obligation, the sureties shall undertake suretyship liability according to their proportion of suretyship agreed in the suretyship contract.

• 没有约定保证份额的，保证人承担连带责任，债权人可以要求任何一个保证人承担全部保证责任，保证人都负有担保全部债权实现的义务。