EchoLink - EKO is an education, skills, and career experience information platform based on blockchain technology. Based on the immutability and timestamp capabilities of blockchain technology, EchoLink - EKO provides employers with a verifiable source of education, skills, and career experience information, thereby saving a lot of manpower and financial resources for background checks during the recruitment process.The EchoLink - EKO technology system can also be widely used for document authentication in industries such as notarization, finance, and banking, with broad application prospects....