The probe of Chang'e-4 will launch from the Xichang Satellite Launch Center(XSLC) on December 2018. The probe will land on the moon farside, and carry out moon farside based in-situ and roving exploration, such as radio astronomy observation and investigation and so on.
　
The probe uses 5 RHUs to solve the problem of probe's survival and power supply during the moonlight.
　
The RHUs used by Chang'e-4 mission have passed strict Qualification Test such as Vibration Test during the development, which can meet the requirement of use security in space both in normal and unexpected emergency conditions, and also have passed the security assessment.