China is disturbingly unreliable in complying with international agreements.  Just read the UN treaty on political and civil rights, which China pledged to honor, and compare it to China's continuing record of persecution.  In fact, even as U.S. trade negotiators were talking in Beijing, a Chinese court sentenced four members of a spiritual movement to lengthy prison terms.   It would be naïve to assume China might suddenly behave differently if allowed into the World Trade Organization.