protected override async Task ExecuteAsync(CancellationToken cancellationToken)
 {
     while (!cancellationToken.IsCancellationRequested)
     {
         try
         {
             AcquisitionUnit unit = new  AcquisitionUnit();
             unit.Result = EnumAcquisitionUnit.SUCCESS;
             dbStorage.SaveAcquisitionUnit(unit);
             List <string> list = new List <string> {
                 @"https://wx.5i5j.com/xiaoqu/o3/",
                 @"https://wx.5i5j.com/xiaoqu/o3n2/"
             };
             list.ForEach(item =>
             {
                 Process(item, unit);
             });
         }
         catch (Exception e)
         {
             Console.WriteLine(e.Message);
         }
         await Task.Delay(1000 * 60 * 30);
     }
 }