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  _____      ___      ______     ___     __   __  
 / ____||   / _ \\   /_____//   / _ \\   \ \\/ // 
/ //---`'  / //\ \\  `____ `   / //\ \\   \   //  
\ \\___   |  ___  || /___//   |  ___  ||  / . \\  
 \_____|| |_||  |_|| `__ `    |_||  |_|| /_//\_\\ 
  `----`  `-`   `-`  /_//     `-`   `-`  `-`  --` 
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發送短信 : Cross-blockchain architecture for secure storage and verification of vaccination records