SarePoint Powershell Add user to Group

$FromGroupnames = "001总经理","010101管理本部"
$ToGroupname = "test"

$SPWeb = Get-SPWeb -Identity http://192.168.0.50:81/
$groups = $SPWeb.SiteGroups
$count = 0

foreach ($group1 in $groups )
{
    foreach ($group2 in $FromGroupnames)
    {
           if($group1.name -eq $group2)
        {
            foreach ($user in $group1.users)
            {
                Set-SPUser $user -Web $SPWeb -Group $ToGroupname
                Write-Host $ToGroupname.name "adding: " $user.name;
                $count++
            }            
        }
       }
}
Write-Host "complete!user count ="$count