签章

In Chinese commercial practice, a contract is usually not just 签名 (signed) but 签章 - signed AND stamped with the company 公章 (official seal). The chop often carries more legal weight than a signature; losing or misusing a corporate chop is a serious incident.

usage

Since the 2005 电子签名法, electronic signatures (电子签章) are legally equivalent to handwritten signatures for most contracts - enabling platforms like 法大大 and e签宝.