What kinds of safeguards does Chang'e 4, China's lander on the dark side of the moon use, in order to prevent biological contamination on the moon?
How well are they documented?
@Uwe answered my question
The conditions on the Moon are the safeguard against anything biological from Earth reproducing itself outside a lander. Vacuum, temperature, lack of water, intensive UV radiation would kill any living unprotected cells. Moon is a perfect sterilization device. If a cell is not killed during hours there are a lot more days, weeks and months to do the remaining work.