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CK2 Dev Diary #62: News from China

Greetings!

Last week I talked about how we’re adding China to the world of Crusader Kings II without actually extending the map any farther. When you are playing in the Orient, you would be wise to remember the “Divine Land” to the east. Indeed, from time to time, you will be getting tidings about the situation in China so that you can plan accordingly. China has a Status and a Policy. The latter rarely changes except when a new emperor ascends to the Dragon Throne (or when the Western Governorate either wins or loses a major war.) By far the most common Policy is “Open”, which means it’s business as usual; China is open to trade and the Silk Road is active. Moreover, the emperor is interested in maintaining the tributary system and in conducting diplomacy with the barbarian periphery. However, some Chinese administrations favor a “Closed” Policy. At such times, the Silk Road will be shut down and the emperor will not deal with foreign rulers. Neither will China attempt any form of military adventures beyond its borders. Lastly, and most rarely, China may adopt an “Expansionist” Policy. This is a time of great peril for rulers near the Chinese border, who would be well advised to swallow their pride and kowtow to the emperor, accepting tributary status before the Western Governorate is expanded with extreme force...

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Chinese Policy should be seen as a political stance, but China also has a “Status”, which is beyond the emperor’s control. For example, China can be struck by famine, plague, unrest, Civil Wars and invasions by Mongols and Jurchens, and it can also sometimes experience a “Golden Age”. All of these states have an impact on China’s behavior and on the Silk Road. For example, if China suffers from famine, income from the Silk Road is drastically lowered, and players should watch out for the conclusion to a Chinese Civil War or Altaic invasion; it is not unheard of for a displaced dynasty or losing faction to seek refuge in the West… More on that in a later dev diary. I believe that will do it for today. Next week we’ll go into details about how you interact with China and what’s in it for you!
 
That's impossible except SONG when china united 。if china is united ,one of other country may call their rule "皇帝“ ,This means war ,because there is only one 皇帝 in this world
Japense emperor called himself Emperor of Heaven and Prince Shōtoku addressed in the letter he sent to Sui emperor "From the emperor of east to the emperor of west." Sui had unified China but it didn't invade Japan. Emperor Yang of Sui was annoyed at this slight but his advisers urged him not to expel theses emissaries, from which you can see, even ancient politics take practical interests more seriously than saving face. (Prince Shotoku did try to send another letter this time addressing the Japanese emperor "Emperor of Heaven" at which point his emissary made a run because he knew this would greatly piss off Emperor Yang of Sui.)

Korea internally used Era name of their own before Joseon dynasty which is in theory only possible for emperors. Also they addressed their rulers "Your imperial majesty" (陛下) prior to Mongol invasion of Goryeo although outside they addressed their ruler as kings.

Vietnam too had emperors before they were directly subjugated by China.

You are mistaking what China did for face for actual power they held over other countries, which in many cases they didn't. Like in subjugation of Vietnam by Ming, China could only enforce their lordship as a consequence of military conquest, not the other way around. In most other cases it were simply formality. Also in practice China paid lots of 'tribute' to its nomad neighbours, only that they considered it as gifts to save face.