There isn't really a hard limit, the longer the cable, the bigger the losses. You can mitigate that somewhat by increasing the voltage, which is what they're doing.
So basically the distance is determined by economics. If China could install solar and cables cheaply enough, then they could compete with domestic European and American electricity. I find that doubtful though.
So basically the distance is determined by economics. If China could install solar and cables cheaply enough, then they could compete with domestic European and American electricity. I find that doubtful though.