Create Global Module with typescript

Cocos Creator
1

I want to short cut the import string.

My project structure:

Root
├── assets 
│       ├── _root
│       │       ├── submodule.ts
│       │       ├── global.ts // export module
│       ├── scripts
│       │       ├── test.ts
│       │       ├── other.ts // Importer
 ...

//file global.ts
export module global {}

//file test.ts
import { global } from './../_root/global' //< long sytax

I tried to modify my tsconfig.json

{
  /* Base configuration. Do not edit this field. */
  "extends": "./temp/tsconfig.cocos.json",

  /* Add your custom configuration here. */
  "compilerOptions": {
    "strict": false,
    "target": "es2019",
    "allowSyntheticDefaultImports": true,
    "baseUrl": "./",
    "paths": {
      "@global": ["assets/_root/global"]
    }
  }
}

now all I need to do is:

//file test.ts
import { global } from '@global' //< Error, can not regconize the @global

Please tell me how to fix this. Tks alot