發送短信 : Flow backup caused by structures within open channel

   _____    _____     ______   __   __   _    _   
  / ___//  |  ___||  /_   _//  \ \\/ // | || | || 
  \___ \\  | ||__    `-| |,-    \ ` //  | || | || 
  /    //  | ||__      | ||      | ||   | \\_/ || 
 /____//   |_____||    |_||      |_||    \____//  
`-----`    `-----`     `-`'      `-`'     `---`