"Some think that the Chang'e-3 mission provides an opportunity for China and NASA to collaborate. How has that been going? It is indeed a wonderful opportunity. The landing of the Change'e-3 spacecraft on the Moon kicked up a lot of dust over a landscape that had already been carefully surveyed by NASA's two Moon orbiters, the Lunar Reconnaissance Orbiter and the Lunar Atmosphere and Dust Environment Explorer. This is a perfect controlled experiment -- by coincidence rather than by design -- to study the composition of lunar dust and atmosphere, but it will require data exchange between the two countries. China is eager to collaborate, but nothing has come through from the US side because of the 2011 spending bill."
Keith's note: Our Congress goes out of its way to not cooperate with China in space because they do not like China's internal and foreign policies. Russia invades Ukraine, the U.S. howls in protest, and yet we still operate the ISS together with Russia. Consistency? Of course not.