Chinese scientists build model Mars atmosphere to aid sample-return plans 

 Chinese scientists have constructed a numerical model to simulate the Martian atmosphere and thus assist the country's plans to return rock samples from the Red Planet.  

https://cdn.mos.cms.futurecdn.net/GMVAe7JYj3HbnRcpK3wvFF.jpg

https://www.space.com/china-mars-sample-return-model-atmosphere