CNSA Tianwen-1 · Hibernating
China's first Mars rover, part of the Tianwen-1 mission. Landed in Utopia Planitia on 14 May 2021, operated for 347 sols covering 1.92 km before entering hibernation in May 2022. Carries a ground-penetrating radar, laser spectrometer, and multispectral camera.
Tianwen-1 (meaning "Heavenly Questions") was China's first independent interplanetary mission, launched on 23 July 2020. The mission was remarkably ambitious: it combined an orbiter, lander and rover in a single launch — something no space agency had attempted before for Mars. The spacecraft entered Mars orbit in February 2021, spent three months surveying the landing site, then deployed the lander and Zhurong rover to the surface on 14 May 2021.
Zhurong landed in the southern portion of Utopia Planitia, the largest recognized impact basin in the solar system (3,300 km diameter). This region was chosen because orbital data suggested subsurface water ice might exist at shallow depths — a hypothesis Zhurong's ground-penetrating radar was specifically designed to investigate. The terrain is relatively flat volcanic plains, ideal for a solar-powered rover's first Martian outing.
Despite its relatively short operational period, Zhurong made significant scientific contributions. Its ground-penetrating radar (RoPeR) detected evidence of two major flooding events in Utopia Planitia that occurred approximately 3.4 billion and 1.6 billion years ago — much more recently than previously thought. The rover also found hydrated minerals suggesting past water-rock interaction, and its atmospheric measurements provided new data about Martian dust storms and surface-atmosphere interactions.
As Martian winter approached in May 2022, Zhurong entered a planned hibernation mode. Solar-powered rovers cannot generate enough energy during the dusty, dark winter months at its latitude. CNSA expected Zhurong to wake when spring returned in December 2022, but the rover has not resumed communications. Orbital imagery from NASA's Mars Reconnaissance Orbiter shows the rover has not moved since hibernation began, and significant dust accumulation on its solar panels may be preventing adequate power generation.
Mars Surface Composition Detector — a laser-induced breakdown spectroscopy (LIBS) instrument similar to Curiosity's ChemCam. Fires a laser at rocks to analyse their elemental composition from a distance.
Rover Penetrating Radar — dual-frequency ground-penetrating radar that images subsurface structures to depths of 10–100 metres. Detected evidence of ancient flooding events in Utopia Planitia.
Navigation and Terrain Camera — stereo cameras for navigation and panoramic imaging of the Martian landscape.
Multispectral Camera — captures images across multiple wavelength bands to study surface mineralogy and rock composition.
Mars Surface Magnetic Field Sensor — measures the local magnetic field at the surface, providing data about Mars's ancient magnetic environment.
Mars Climate Station — monitors atmospheric temperature, pressure, wind speed and direction, and sound. Zhurong recorded audio of the Martian environment.
2.6 × 3.0 × 1.85 m with solar panels deployed. Roughly the size of a small riding mower. Six-wheeled rocker-bogie suspension, similar in concept to NASA rovers.
Four deployable solar panels generating ~140 watts. Unlike Perseverance and Curiosity, Zhurong relies entirely on solar energy, making it vulnerable to dust storms and seasonal light changes.
Communicates via UHF relay through the Tianwen-1 orbiter. The orbiter relays data to Earth via X-band link. Direct-to-Earth communication is not supported by the rover alone.