电子签章，可根据不同情况下进行签章身份的认证，使用方便-electronic signature, under different circumstances under seal identity authentication, easy to use

电子印章的DEMO实现，实现了电子签证的基本功能。电子签证在电子商务和电子政务中有重要应用。-Electronic seal DEMO achieved to realize the basic functions of electronic visas. E-visa in e-commerce and e-government has important applications.