Add-Type -AssemblyName System.IO.Compression.FileSystem
$zip = [System.IO.Compression.ZipFile]::OpenRead('d:\20_AI\LSPi\tools\rtthread-nano.zip')
$dest = 'd:\20_AI\LSPi\libs\thirdparty\rt-thread'
$prefix = 'rtthread-nano-master/rt-thread/'
$count = 0
foreach ($e in $zip.Entries) {
    if ($e.FullName.StartsWith($prefix) -and !$e.FullName.EndsWith('/')) {
        $rel = $e.FullName.Substring($prefix.Length)
        $out = Join-Path -Path $dest -ChildPath $rel
        $dir = [System.IO.Path]::GetDirectoryName($out)
        if (!(Test-Path $dir)) {
            New-Item -ItemType Directory -Path $dir -Force > $null
        }
        [System.IO.Compression.ZipFileExtensions]::ExtractToFile($e, $out, $true)
        $count++
    }
}
$zip.Dispose()
Write-Host "Extracted $count files to $dest"