public JsonResult GetEmployees()
        {
            var employees = _userAppService.GetAllAdmins()
                            .Select((m, i) => new EmployeeViewModel()
            {
                Id                   = m.Id,
                SId                  = i + 1,
                UserName             = m.UserName,
                NickName             = m.NickName,
                CreationTime         = m.CreationTime.ToStandardDateOfChina(),
                LastModificationTime = m.LastModificationTime?.ToStandardDateOfChina(),
                RoleNames            = _roleAppService.GetAllRolesByUserId(m.Id)?.Select(r => r.Name)
            }).ToList();

            employees.ForEach(e =>
            {
                if (IsSuperManager(e.Id))
                {
                    e.IsSuperManager = true;
                    return;
                }
            });
            return(Json(employees));
        }