This week on the Caixin-Sinica Business Brief: In an effort to reduce energy consumption, China’s Inner Mongolia Autonomous Region prepares to crack down on bitcoin mining; a new study analyzes the potential environmental impact of 5G technologies; and China’s yuan surges to a three-year high against the U.S. dollar. 

In addition, we speak with Nandini Venkata about an ultramarathon in Gansu province where extreme weather claimed the lives of 21 contestants.

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