I want to know the answer to the following question:
When did Emperor He's reign end?
All the background I'm provided with is that "After Emperor He's death, his wife Empress Deng Sui (d. 121 AD) managed state affairs as the regent empress dowager during a turbulent financial crisis and widespread Qiang rebellion that lasted from 107 to 118 AD.". Is that enough to answer the question?
Answer: no