So here's my take on the Southern Song challenge, actually finished it last week bar some translations (thanks Hendryk!). I need to head off this weekend before the deadline so there is still some unfinished bits – the tablet was going to have some cool buttons and I was going to name all the little Malay states (sorry Ridwan!).
Anyway onto the thinking behind the map – this is future era again so I can use those satellite base maps I enjoy so much. The PoD is the Jin being too cowardly to move their capital leading to no Mongol invasion of China (instead they get up to stuff in the west as the map shows). Hence the Song survive and prosper. However a great deal of what push Europe ahead in the OTL technological revolution was the competition between established and sovereign states, and to reproduce that I've got the Song evolving the Dazhu (Great Pearls) system. In essence an Emperor got tired of mercantile squabbles and regulating sea trade whilst he was trying to defend the northern border and issued a series of decrees that bound any individual merchant group to one of several specific coastal cities, gave those cities reduced taxes in exchange for defending the coast, and told them to do whatever they wanted in the wider world provided they shut the hell up within China. He thus produced a bunch of aggressive profit seeking city-states embedded in the coast of China, each protected from dominance by the others not by actual geography as in Europe, but the political geography of the emperors will. In a century or so the Dazhu had wrapped up trade in the Pacific and Indian oceans nicely and were rapidly developing labour efficiency to compensate for their limited resources and kicked off a whole technological revolution.
However in the West the Mongols had busily conquered Germany and established a great steppe empire (this actually becomes something of a German-wank as the Mongols spread a 'Tartar-rural, German/Jewish urban areas, 'Mongol' aristocrats' social model all over Hungry and Southern Russia to the detriment of the Slavic populations.
Stuff happens, the Chinese advance (but find the Europeans and Indians much keener on emulating them than the OTL Chinese were of Europe). The Chinese don't colonise on the European model (indeed the court actively forbids large scale of peasants) except in Malaya and the Philippines where a slow violent displacement occurs (the Dazhu on occasion get up to stuff every bit as bad as a the European East Asia companies in SEA, though are much more pleasant to India, Africa and the New World compared with the OTL).
As to the imagine, this is obviously some fancy pants computer tablet that runs on microfluidic chemical processing (the electronic logic gate being missed in this TL). The text is crazy because in this timeline English has had to adapt to the dominant Chinese, Mongolian and Arabic typological paradigms, hence is now read down first and left from right, and has been embellished and modified to look more Mongolian and Arabic. Note several of the letters have changed and some new ones have turned up (namely i is now – (capital =), y is (, 'th' has its own letter / (capital looks like //), as does 'ch' the letters of which look like a squashed ir and |{). I can share the font if people want it.
Glossery:
Zineike - "honorable guests of the inner forbidden court", higher ranking tributary states (has little to do with their political power)
Ziwaike - "honorable guests of the outer forbidden court”, lower ranking tributary states
Dazhu – mercantile cities with special privileges and independence in China
Yaozhu – their daughter cities around the globe
The rest you'll have to guess
Legend Reads:
“Map produced with imagery from Changezhou Earth observatory made available from the Zhongsource on CH 1904.
The worldsystem stands on the cusp of transformation as the long standing duality between the Servants of Heaven and the Great Qingzhen States begins to shift. The rapid population growth of the New World states, their advances in <optics>, and their resource and information based economies promises to tip the balance of power towards the Servants of Heaven and away from the Great Qingzhen they so detest. A similar, if less pronounced, shift of the same character is occurring in Africa as many of the numerous nations there industrialise on cheap labour. Though this all appears fortuitous for the Servants of Heaven, there is growing dissatisfaction with their stewardship of the worldsystem and mutterings occur even in the highest ranks of the Zineike over the mismanagement of the worldsystem fluidity crisis, and #e Ten Courts indifference to the rare minerals shortages or heavy metals contamination of the seas as long as Huangzhou remains gleaming.”