China is making major headway in its mission to land a rover on the moon â a big step forward in the nation's ambitious lunar exploration plans. At China's Xichang Satellite Launch Center, the moon-bound Chang'e 3 spacecraft is undergoing its final tests ahead of a planned launch in early December. The touchdown target for the Chang'e 3 mission â a lander and a lunar rover â is thought to be Sinus Iridum, known as the Bay of Rainbows, a plain of basaltic lava on the moon, according to reports by China media outlets. Â An earlier Chinese lunar orbiter, Chang'e 2, eyed the moon-landing zone in 2010, showing the site's flat topography and other interesting features. China space watcher Bob Christy of the informative website Zarya.info told SPACE.com that his best estimate for a China lunar launch is Dec. 1.