Trump and Xi Jinping agreed Dec. 1 to postpone more tariff hikes.
Asian giant draws line in sand over tech policies.
Accused of approving the sale of a state-owned food and beverage company at a huge loss.
The other major polluter enters into joint emissions-cutting initiatives.
Potent greenhouse gases far more powerful at trapping heat than CO2.
Panetta talks cyber issues with Chinese, but makes little headway