From the Xing Dynasty
To the Shanghai Commune
I, Zhou Xing, Second of that Name, Holder of the Mandate of Heaven, Emperor of All China, King of Wuhan, Overlord of the Great World Island, Inspector of the Sunset Continents, Admiral of the Seven Seas, do greet you in peace.
I admire the tenacity of the people and the proletariat for overthrowing the false and blasphemous "King" (translate: Tyrant-Lord) of Shanghai, and thus proving him unworthy of participating in the Mandate of Heaven. We all are Chinese, all stretching from the Great Peaceful Ocean to the east, the Great Hindu Ocean to the South, the Great Yuazien Steppe to the West, and the Great Ice Cube to the North. And we all are one under the great Eye of Heaven: Yellow Emperess, Yezu Chufuzi, Budah, Ahlah and others are his names.
I will offer this deal once, and I will offer this deal one time ONLY. Declare I, and the Xing Dynasty your Sovereign and your rightful Emperor, and cast unto me all your powers and your peoples. In addition, I ask for 1EP of your natively produced goods and crafts of the sea. In return, I shall return them all, name you Suzerain of the Shanghai Commune and Supreme Warden of the Great Pacific Ocean, and let you live under your own, native formed government. Call me not generous, for if you do so we shall grant you gifts beyond imagine from our Mountain Lairs.
However, if you refuse to accept my generous offer, I shall declare you Outlaws, Counterrevolutionaries, and Rebels, and cast you from the gaze of the Eye of Heaven, and unleash upon you the fury of all Sichuan currently under my rule, and burn all you have built to the ground, so that sanctified reconstruction may commence. Until you repent of your decision to reject the above and accept a future deal, the fury shall not end until all is destroyed.
Choose well, my friend. Enter the Empire as a brother, or die as an Outlaw.
OOC: For those who know Chinese, the pinyi hides a pun.

Also, worked a bit with time affecting traditions and translations.Suzerainly
For the deal itself, basically grant me everything as per Chinese Absolutism AKA Legalism, and I shall return everything you just gave me right back and accept you as a "independent" client state. The only thing I have absolute power over you on is foreign policy, and even then you can break "orders" as long as you accept consequences. (aka, I will support you in a war only if you provoked it accidentally, did it under my direction, or gave me good reason to not let you suffer for it). Ergo, they are more guidelines. Everything else domestically is totally under your control, with certain things I will ask and you will grant as tribute. Pretty sure this is how/Chinese Client States operate, but if not, differences are from now on assumed to be intentional.
Also, you have 9 in your military and 18 to spend this turn. I have 67 EP. Do the math. I really don't want to destroy you. Negotiation is possible, if done respectfully and according to neo-modern-confucian-stuff principles.