0xf7c7b36f…c6d7sent to0xd589d6e8…db892018-11-15·#6,707,773·view on Etherscan My teaching certificateid: 3265632https://ugcorigin.s-microsoft.com/100/1b7b09ec-fd51-406f-b9bb-7679c203e0be/200/v1/image.jpgOn the global blockchain forever!