I want to know the answer to the following question:
Why did the Chinese goverment denounce the accord?
All the background I'm provided with is that "After the Xinhai Revolution (1911–12) toppled the Qing dynasty and the last Qing troops were escorted out of Tibet, the new Republic of China apologized for the actions of the Qing and offered to restore the Dalai Lama's title.". Is that enough to answer the question?
Answer: no