16 May 2019
Yutu 2, the first rover on the far side of the Moon, has found materials from deep inside the Moon that could help unravel the mystery of the lunar mantle composition and the formation and evolution of the Moon and the Earth.
Using data obtained by the visible and near infrared spectrometer installed on Yutu 2, a research team led by Li Chunlai, with the National Astronomical Observatories of China under the Chinese Academy of Sciences, found that the lunar soil in the landing area of the Chang'e 4 probe contains olivine and pyroxene which came from the lunar mantle deep inside the Moon. The first important scientific discovery of the Chang'e 4 probe since it made the first-ever soft landing on the far side of the Moon was published online in the latest issue of the academic journal Nature.
link to original publication of the findings in Nature magazine:

Chang’E-4 initial spectroscopic identification of lunar far-side mantle-derived materials
article about Yutu 2's findings on National Geographic
Chinese rover finds strange rocks that may come from deep inside the moon
article about Yutu 2's findings in Scientific American
From the Lunar Far Side, China’s Rover Reveals Moon’s Hidden Depths