It would seem to be more useful to connect more than just Chile and China (greater diversity of buyers and sellers of electricity), but maybe if China plans to

It would seem to be more useful to connect more than just Chile and China (greater diversity of buyers and sellers of electricity), but maybe if China plans to consume the entirety of the cable's capacity, maybe a single point-to-point link actually does make the most sense in this case. On the other hand, it's possible the cable will be under-utilized for half the day: when it's night time in Chile, they could buy power back from China, but will China have enough surplus? And is there enough demand in Chile (or its neighbors) to buy that much power?