Task: Question Answering
Input (English): Passage: The Miao Rebellion of 1735-36 was an uprising of autochthonous people from southwest China . The uprising was the greatest of several rebellions of 1720-30 against the Manchu-led Qing Empire, which ruled China from 1644 to 1912. They were all caused by the encroachment of the Han Chinese on their territories and abuses by the imperial administration. 
Question: How many years did the Manchu-led Qing Empire rule China? 
Answer type: Number 
Output (English): 268.