Sun Yat Sen is from the Shanghai-Ningbo area, same as Chiang Kai Sek and his son. Sun (Song?) is a family name whose clan had great predominance in this region even if you look back to ancient Chinese history (Sun Quan of the 3 Kingdoms period, Sun Tze of the Warring States period, both of the Wu kingdom).
In his foreword to one of the English editions of Sun Tze Art of War, famous British strategist Basil Liddell Hart wrote about his surprise why the KMT officers ignored the study of Sun Tze, saying its "obsolete" in view of their Westernized training (Clauswitzian concepts of warfare). Obviously they learned the hard way. Mao's own military doctrines and thoughts often reflect that of the Art of War, modernized and given a Communist-revolutionary color.
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Sun Yat Sen and all these Shanghainese like Chiang Kai Sek, are all born from urban, highly educated roots with a silver spoon in the mouth. Thus there is a cultural, urban-rural, and educational divide between them and the rest of the people. No offense to Shanghainese, but the fact that they're also Shanghainese adds to that divide, since they can talk among themselves in a dialect that no other mainlander Chinese group can understand. This creates a nation within a nation mentality, sometimes laced with a persecuted minority chip-in-the-shoulder complex, something I've also observed with Fujienese, Cantonese and Hakka.
With this kind of mentality, this gives them a sort of urban east coast Chinese city kind of concentration, neglecting the inner China rurals, as well as to the north.
Ironically, the Chinese Communist Party was born in a restaurant in Shanghai. The restaurant is still there, and there is a plaque to commemorate the event. Great ideas may came from a meeting of minds over dimsum.
Back to the present. After Deng Xiao Ping left power, Jiang Zhe Min and his infamous "Shanghai clique" takes power, consolidating their hold on the CCP which began even during the Deng years. You can see the results of the early development---heavy concentration on development of cities in the east coast, creating pockets of prosperity and modernization in the east and the south, while the countryside to the west and to the north languished. One of the social criticisms leveled against the JZM era is this growing divide between rural and urban, between peasant and businessman.
It changes now with Hu Jin Tao. HJT hails from the Gansu region, which is the north and the west, west even of Xian and along the Silk Route. Traditionally. Gansu is a crossroad of minorities from Tibetan to Mongol to Turkish people. The Xi Xia Dynasty used to be there too before being annihilated by Genghiz Khan, and the last Khan of the Mongols died in Gansu centuries later. Before that, Gansu is the homeland of an indo european minority called the Yuezhi, before they were driven out by the Huns and migrated to the Hindu Kush. Today, many minorities live in Gansu, one of the poorest provinces in China, from the Moslems like the Hui and Turkish related groups, to Mongolians. Hu family name, like Ma, is one associated with northwestern Han peoples, with Islamic influence. Some theorize its really short of Hussein, just as Ma is short for Mohammed.
I believe a person's background will influence the way he thinks, and HJT may be one to restore the balance of development from being heavily centered in the south and the east, to the north and the west.