I want to know the answer to the following question:
How old was Tongzhi when he came to power?
All the background I'm provided with is that "Zeng Guofan, in alliance with Prince Gong, sponsored the rise of younger officials such as Li Hongzhang, who put the dynasty back on its feet financially and instituted the Self-Strengthening Movement.". Is that enough to answer the question?
Answer: no