Complex sentence: The Shun Dynasty lasted less than a year with Li's defeat at the Battle of Shanhai Pass, with the victorious Manchus establishing the Shunzhi Emperor of the Qing Dynasty as ruler of all China.
Split into simpler sentences: The Shun Dynasty lasted less than a year with Li's defeat at the Battle of Shanhai Pass. The victorious Manchus establishing the Shunzhi Emperor of the Qing Dynasty as ruler of all China.