Assimilate the Sinosphere Cultures into Chinese Group

Now Japanese, Korean, Vietnamese, Manchu, Mongol, and Tibetan Emperors of China can shift their culture into the Chinese Group, making it easier to extend their regime over the vast imperial heartland of China!

This mod is almost always version-compatible, provided that your game version is higher than the game version supported by the first version of this mod. You can safely ignore the outdated mod warning.

This mod works without the Mandate of Heaven DLC, but it does enhance the playthrough to have it. It makes much more sense to assimilate your culture with you being the Emperor of China.

NOW COMPATIBLE WITH EVERYTHING

The Sinosphere—a collection of East Asian countries that share common heritages descending from the ancient Chinese dynasties, is now on the path to a unification. The DLC Mandate of Heaven enabled ambitious non-Chinese Sinosphere monarchs to claim the Mandate of Heaven, a sacred regime bestowed by the order of the universe to reign over the Tiānxià, or "The World", as a Tiānzǐ, or "The Son of Heaven". Despite being the Emperor of China, however, these countries suffer severely from the fact that their primary culture is not one of the Chinese culture group in-game. There are a vast number of Chinese cultures in the game, and one cannot simply institute all of them as accepted cultures. As a result, in spite of being the Emperor of China, their expansion is strongly discouraged from going into the Zhōngyuán, or "The Centre of the World", the traditional heartland of every Unified Chinese dynasties.

This mod aims to fix that. Now, the most powerful Sinosphere countries can assimilate their own cultures into the Chinese group, upon successfully claiming the Mandate of Heaven from the previous Chinese emperor.

A major decision named "Assimilate XXX Culture into the Chinese Group" will appear if you play as Korea, Dai Viet, Japan (unified Japan at the Empire rank, not the Shogun nor the Daimyo), Manchu/Qing, Yuan (the Mongolian Empire), or Tibet (the unified one).

• With the Mandate of Heaven DLC, you must first be the Emperor of China to enact the decision.
• Without the Mandate of Heaven DLC, you must be of Empire rank (with the Common Sense DLC) or have at least 1000 total development (without the CS).
• You must accept at least 2 Chinese cultures (3 for Japan, as the Japanese culture is slightly more distant).
• You must have at least 200 Diplomatic power.
• You must have the corresponding culture as your primary culture (any of Togoku, Saigoku, or Kyushuan for Japan; any of the Mongol, Chahar, Khalkha, Oirats, or Uyghur for Yuan)
• You must form Qing first if you are Manchu.
• Upon assimilating the culture, all your owned provinces with that culture will convert the new, Sino-assimilated versions of that culture: Neo-Korean, Neo-Vietnamese, Sino-Japanese, Sedentary Manchu, Sedentary Mongol, and Secular Tibetan.

After somebody assimilates a culture into the Chinese group (not necessarily you, but AIs will always try to enact the assimilation decision whenever possible), You will be notified of it by a small event. After that, you can adopt the new version of your culture as your primary culture by decision.

• Your current primary culture must be the corresponding non-assimilated version of the culture that you are adopting (any Japanese for Japanese; Manchu for Qing; and any of Mongol, Chahar, Khalkha, Oirats, or Uyghur for Yuan).
• This requires 100 Administrative power.
• AIs will always try to enact this decision. This is useful when you created Colonial Governments because they share your primary culture.

After adopting the New Sino-assimilated culture, you can enact two additional decisions:

• Converting all of your owned provinces with corresponding non-assimilated culture to the assimilated versions. Note that this decision is now available to any country which accepts these cultures as of version 1.2 of this mod. Requires 100 Diplomatic power.
• Converting your ruler and heir to the new culture. I intentionally left consorts (queens, etc.) unchanged considering the Royal Marriage dynamics. AIs will always try to enact these decisions as well.

The assimilated cultures are all in the Chinese culture group. However, they retain their graphical GFX (the Advisor protraits) and character names (rulers, heirs, generals, etc.).

Primary nation of the assimilated cultures are usually the countries that can enact the decision as the emperor, often the unified country or an Chinese dynasty (Japan, Yuan, Qing, Tibet).

In addition, the famous Manchu culture retains the banner system even after the assimilation, so yes, if you want that powerful, all-mighty Chinese Qing Empire before the patch 1.20, you’ve come to the right place.

Having Secular Tibet culture prevents the Dalai Lama event.

• Add player-only event that notifies the Chinese assimilation of any culture, for the case you are not playing as the one enacting the decision (this can happen more frequently if you do not own the Mandate of Heaven DLC) – DONE.
• Add Development-dependent Diplomatic power cost for the province converting decision – partially DONE. Not scaleing as of Version 1.3

As the more this mod gains popularity (honestly, I didn’t expect this when I first published this mod. I was more like making a mod for my own use), the more people ask me to add cultures to the list. While I am quite open to such suggestions, I also feel that it is not right to make every single culture bordering China being able to be assimilated, making the Chinese group very OP. But at the same time, I should not do that arbitarily. So I came up with these criteria to decide whether or not a culture should be in the group. A culture has to fulfil any one of these to be considered assimilatable.

• A culture that primarily uses Chinese characters (or slightly modified versions of it) as their written language.
• A culture that has Confucianism and the Chinese Ordinance as their primary reigning philosophy and government system, accepting the idea of "Mandate of Heaven". Confucianism is more like a ruling philosophy, so that does not strictly require the provinces of that culture to have the Confucianist religion in the game.
• As described by the developers of the main game, the cultural group is not a linguistic separation. So it does not matter if the culture uses language of Sino-Tibetan family. Actually, the ST family is a huge family, just like Indo-European family. However, if the people heavily uses any dialect of Chinese language, then it is included.
• It is always included if there was any historical dynasty of that culture that unified China (so it’s the case for Yuan and Qing).

NOT IRONMAN COMPATIBLE.
This mod is (theoretically) compatible with virtually EVERYTHING, as of version 1.3. I am very glad that I found the solution.

You can (theoretically) safely install the mod during a playthrough. However, if any of the assimilation decision has been enacted (either by yourself or by one of the AIs), you cannot uninstall the mod as it will break the savefile, leaving "No Culture" for every provinces and character converted to the assimilated culture. However, if you own all the provinces or have access to the console commands, you can safely revert all of the provinces that appear to have "No Culture" to their original cultures (thus rescuing the savefile).

Currently, only English is supported. Myself not being a native English speaker, I look forward to find any competent translator who can widen the range of supported language.