See Andrew Jacobs in NYT:
In the 31 years since the People’s Republic of China and the United States established diplomatic relations, Chinese officials have often resisted American intervention on human rights, calling the issue a domestic matter. But there has generally been some give and take, largely behind the scenes, especially in the years after the violent suppression of protests in Tiananmen Square, when China was eager to shed its pariah status abroad.
That leverage began dissipating in 2001 after China was admitted to the World Trade Organization, and Congress surrendered the right to review China’s human rights record before granting it favorable trade status.
I'm just sayin' is all I'm sayin'.