Lin Zhao, who was executed in 1968, challenged history and Mao.
New report says China scores lowest on Internet freedom.
Speculation and a falling dollar may now be as important as supply and demand, analysts say.
Toxic blood thinner may have killed as many as 81 people, US says.
Millions of Chinese workers, many headed home for the New Year's holiday, face delays amid some of the country's worst weather in the last 50 years.