Why Did China Send a Probe to the Far Side of the Moon?

For the first time in history, there is a rover on the far side of the moon and the Chang’e 4 mission is just beginning to explore this hidden side.

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China’s Chang’e-4 Launches on Mission to the Moon’s Far Side
https://www.nytimes.com/2018/12/07/science/china-moon-change-4.html
“The rover will land in the 110-mile-wide Von Kármán crater. It is on the far side of the moon, which is always facing away from Earth. (The moon is what planetary scientists call “tidally locked” to the rotation of the Earth. That is, its period of rotation — its day — is the same as the time it takes to make one orbit around Earth.)”

China set to launch first-ever spacecraft to the far side of the Moon
https://www.nature.com/articles/d41586-018-07562-z
“The ultimate goal of the China National Space Administration (CNSA) is to create a Moon base for future human exploration there, although it has not announced when that might happen. Chang’e-4 will be the country’s second craft to ‘soft’ land on the lunar surface, following Chang’e-3’s touchdown in 2013.”

Geological Characteristics of Von Kármán Crater, Northwestern South Pole‐Aitken Basin: Chang'E‐4 Landing Site Region
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018JE005577
“The South Pole‐Aitken (SPA) basin on the farside of the Moon is the largest known impact structure in the solar system. It is the key area to answer several important questions about the Moon, including its internal structure and thermal evolution. We outline the geologic history of an important area (Von Kármán crater) within SPA.”

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