Question: When did Empress Xiaogongren's husband die?
Sentence (from "Kangxi Emperor"): The Kangxi Emperor's reign of 61 years (from 1661 until 1722) makes him the longest-reigning emperor in Chinese history (although his grandson, the Qianlong Emperor, had the longest period of "de facto" power) and one of the longest-reigning rulers in the world.
Relevant evidence: No