So the Shan dynasty doesn't rule China? The Shan that descend from Shan-Da Huang-Di, or The Alexander (as a title)?
Did you expand the China timeline, or did I miss something?
Futuregary was in charge of (re-)writing the history of China. It mostly goes as IRL unti Antiochos III the Great invades China during the uprising against the Qin that would later form the Han dynasty. He establishes the Seleukid Chinese Satrapy of Antiocheia Estate with capital at former Chengdu, which coexists with a much smaller Han dynasty to the east.
Later on, Serindia and India invade the Han during a popular revolt. Serindia also conquers Korea and southern Japan. Alexandros II Anitekos, ruler of Serindia dies, and one of his sons inherits the new Sino-Hellenic empire of Archeserika, which, much like the Ptolemies, has the ruling dynasty going full-on native, even more so that the Greeks in Egypt, adopting local royal temple names and mixing Hellenic customs with the local ones (e.g. a state-run "divine philosophy" derived from Confucianism and Socrates' teachings). Eventually, they become more Chinese than Hellenic. Some lasting traces of Hellenistic culture remain though.
The Three Kingdoms period occurs as IRL, but this time it is more as a reaction against the Hellenistic rulers, jump-started by the Yellow Turbans (whose descendants, BTW still exist in the 1066 scenario: the small Han Taoist state at the easternmost border).
Long story short; it's fought by roughly the same contenders, all of them local Chinese governors/warlords ( Under Greek names, for example, Cao Cao is "Zosimus". Lu Bu is still Lu Bu though. ).
The end is different though, basically, Cao Cao, Sima Yi and the rest of Wei/Jin are thrown out of the picture early in the game, the war is mostly Shu vs Wu vs the remnants of Wei commanded by Lu Bu, who latter on forms his own faction out of the remnants. Liu Bei captures Alexandria Eschate (Capital of Archeserika) and dethrones the Hellenistic rulers, but is defeated by a joint coalition of Zhou Yu (who wishes to avenged Sun Jian's humiliating death at Liu Bei's hands) and Lu Bu.
Liu Bei is defeated in personal combat by Lu Bu, who allows him to live. They sign the Treaty of the Yellow River, which divides Archeserika into three kingdoms, with Liu Bei getting the Southwest, Lu Bu getting the biggest slice; the heartlands and the capital and Zhou Yu getting the Northern lands + the satrapies of Korea and Japan, territories he renames "Hekatonkheira" in honour of Sun Jian (His Hellenic name was "Tychon Hekatonkheiros").
He didn't write much further about China than that, other than the Xiongnu tribes were pressing against the newborn Hekatonkheira with some success.
