Here is the scenario.
1. 1911, Xinhai Revolution succeeds.
2. Tibet and Mongolia declares independence.
3. 1912, Treaty of Gulzha - China grants Greater Autonomy to Mongolia and Tibet (of course with the Great Britain and Russian Empire backing) and accepts them become protectorate of Russian Empire and Great Britian respectively. Ban any Chinese settlement.
4. Britain will station Indian Troops on Lhasa to prevent any aggression from ROC. Function as de-facto independent state. (there is no need to build railway there)
5. At the Conference of Teheran US, UK, USSR agrees to grant independence to Mongolia and Tibet.
6. After WW II, KMT will grudgingly accepts US, UK, USSR offer and holds referendum under international mandate. Tibetians will vote for Independence. Internationally recognizes Tibet.
1. 1911, Xinhai Revolution succeeds.
2. Tibet and Mongolia declares independence.
3. 1912, Treaty of Gulzha - China grants Greater Autonomy to Mongolia and Tibet (of course with the Great Britain and Russian Empire backing) and accepts them become protectorate of Russian Empire and Great Britian respectively. Ban any Chinese settlement.
4. Britain will station Indian Troops on Lhasa to prevent any aggression from ROC. Function as de-facto independent state. (there is no need to build railway there)
5. At the Conference of Teheran US, UK, USSR agrees to grant independence to Mongolia and Tibet.
6. After WW II, KMT will grudgingly accepts US, UK, USSR offer and holds referendum under international mandate. Tibetians will vote for Independence. Internationally recognizes Tibet.