What they got wrong is that images have been taken of the far side of the moon previously. However, this would be the first from the surface. Prior to sending this probe they put a satellite in orbit around the moon to assist with communication.
No. These may be the first photos taken FROM the far side, but certainly not OF the far side. The first images of the far side were taken by the Soviet Luna-3 satellite in 1959. The early US Ranger and Apollo missions took photos as well. I think our most recent probe is the lunar reconnaissance orbiter, launched in 2009.
It's how they selected the landing site. Same as we did with the Apollo landers and the various Mars landers. Other wise you're just taking a shot in the dark that you'll land in a nice, flat place where you can drive around, instead of on the side of a mountain where you'll just fall over.
And if anyone is wondering about communication, there is a relay satellite up above the moon that has a line of sight both to the lander and the Earth; the lander is not transmitting directly through the moon. Again, pretty much the same as we do with the landers on Mars.
I suppose the Moon Hoaxers and Flat Earthers will tell us the Chinese are in on the huge conspiracy to fool everyone while, in reality, we live under rotating glass domes and sit atop a giant tortoise.