Optimize readme.md, example

[SecondDim]

ISSUE

說明 (Description)

Optimize readme.md, example

種類 (Issue Type)

[ ] Feature Request
[ ] Report Bug
[x] Other

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其他說明 (Additional Context)

1. readme 的 test-network 說明更完整
2. example 可讀性需要增強（條列式說明）