Technically this guide is applicable to any game versions or game modes, although to increase the maximum education value, I would suggest the following setup:

• Update the game to version 0.4.2 and up.
  
• Install my mod below. https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3184165545

To learn Chinese while playing Terra Invicta, use the following steps:

1. Start a campaign. Any game setting is fine.
   
2. Capture China using your Councillor ASAP.
   
3. Grant independence to Tibet and East Turkestan from China.
   
4. Research "End of China" project under the "Fall of Empires" global tech.
   
5. Grant independence to Guandong (Manchuria) from China.
   
6. If you have game version 0.4.2 and up:
   
   1. Cede all territories from China to Mongolia.
      
   2. Cede all territories from China to Tibet.
      
   3. Research "Unity Movements" global tech and "End of America" project.
      
   4. Research "Restored Commonwealth" project that got triggered after.
      
   5. Cede Hong Kong from China to United Kingdom.
7. Capture then ask Taiwan (Republic of China) to declare independence.
   
8. If you have my Taiwan mod installed:
   
   1. Research "Liberating Mainland China" project under the "Unity Movements" global tech.
      
   2. Unify all remaining Chinese territories into Taiwan (Republic of China).
      
   3. Grant independence to the Republic of Taiwan from the Republic of China.
9. If you don't have my Taiwan mod installed:
   
   1. Research "Pan-Asian Combine" project under "Great Nations" global tech.
      
   2. Research "The Pacific Defense League" project that got triggered after.
      
   3. Unify Taiwan (Republic of China) into Japan.
10. Live stream or post your playthrough on Steam (or any other social media platforms that are accessible from mainland China, but not being monitored by censors, which *check notes* is Steam).
    
11. Key Step: Enable the comment section on your post.

Regardless whether you can understand or type Chinese characters, you will now have a legion of Chinese followers that are willing to teach you the finer nuances of Chinese language and internet slangs which cannot be found in standard dictionaries - 100% satisfaction guaranteed!

Q1: Why not grant independence to everything else when "End of China" project is researched?

A1: All the other nations under the "End of China" project are not actively challenging the concept of Zhonghua Minzu[en.wikipedia.org] due to their fantastical nature, which is not enough to generate strong educational engagements[en.wikipedia.org] from Chinese audiences.

Q2: Your steps seems convoluted. Why not just flip China with Republic of China and call it a day?

A2: Officially, both China and Republic of China (during the mainland era) endorses Zhonghua Minzu as the supreme ideology in guiding their nation, which a simple flip is not enough to generate strong educational engagements from Chinese audiences.