How to exclude folder expect special folder in vscode?

.
├── 123
├── abc
├── def
├── fed
├── mka
└── plp

I want to exclude floder all floder expect 123. Then in vscode show this tree:

.
└── 123

I try this rule,but not work.

"files.exclude": {
  "[!{123}]":true
}

What should I do?