I found this bit in Puyi's Wikipedia page:
So, what if Lenin or his successor(s) had actually kept the Tsar alive and attempted to convert him?
When the Chinese Communist Party under Mao Zedong came to power in 1949, Puyi was repatriated to China after negotiations between the Soviet Union and China. Puyi was of considerable value to Mao, as Behr noted: "In the eyes of Mao and other Chinese Communist leaders, Pu Yi, the last Emperor, was the epitome of all that had been evil in old Chinese society. If he could be shown to have undergone sincere, permanent change, what hope was there for the most diehard counter-revolutionary? The more overwhelming the guilt, the more spectacular the redemption-and the greater glory of the Chinese Communist Party". Furthermore, Mao had often noted that Lenin had Nicholas II, the last Russian emperor, shot together with the rest of the Russian imperial family, as Lenin could not make the last tsar into a communist; making the last Chinese emperor into a Communist was intended to show the superiority of Chinese communism over Soviet communism. Puyi was to be subjected to "remodeling" to make him into a Communist.
So, what if Lenin or his successor(s) had actually kept the Tsar alive and attempted to convert him?