Collaboration/(协作) -> Performance Practice and Presentation [PPP]/(表演与展示)

Collaboration/(协作) -> #[Tier 3] Essential Knowledges for Performers/([第三]必要知识层为表演者) -> Users Group/(用户群)

Collaboration/(协作) -> Practise/(实践) -> Step 3 Undergraduate/(第三步大学) -> Years Group/(年级群)