JunoWei

Checklist: - [x] I have read [freeCodeCamp's contribution guidelines](https://contribute.freecodecamp.org). - [x] My pull request has a [descriptive title](https://contribute.freecodecamp.org/#/how-to-open-a-pull-request?id=prepare-a-good-pr-title) (**not** a vague title like `Update index.md`) Closes #531