There is now another mission to Mars formally in the works. For several months there have been reports of a Chinese Mars mission planned for 2020, and in November China's State Administration for Science, Technology, and Industry for National Defence announced plans to go forward with its development. It will include both an orbiter and a rover. The mission is planned for launch to Mars during the 2020 launch opportunity (so probably in July or August 2020).

The program includes plans for Mars sample return in 2030, which we all know is an expensive undertaking. Another article, from the South China Morning Post, makes it sound as though the Mars mission was competing against two other ambitious mission proposals: a human mission to the Moon, and three near-Earth asteroid landers. So this announcement could signal a hiatus in China's lunar ambitions. Or it might not! Reading future mission plans from Google translations of secondary sources is hazardous.

The video below includes an animation of the planned mission, showing (from 1:47) a lander detaching from the orbiter before the orbiter arrives in Mars orbit. The lander does not obviously have any instruments on it -- in the video, it appears just to be a platform from which the rover deploys. If you watch to the end of the video, you'll see a display from the Zhuhai Airshow that includes models of orbiter, lander, and rover; on the screen in the back you can see more of the computer animation of the mission, including initial deployment of the rover's mast.