Hangzhou Tiangu Information Technology Co., Ltd., operating under the brand name eSign, is a service provider of electronic signature solutions in China. The company specializes in offering secure and reliable digital signing services that facilitate electronic document management and authentication for various industries. Their platform supports cloud-based signing, digital contract management, and legal compliance, ensuring the integrity and legality of digital documents. Through its website, https://www.esign.cn/, eSign provides businesses with tools to streamline their electronic document workflows, enhance operational efficiency, and reduce paperwork-related costs.