>grok bring me up to speed on China's fusion development regarding these news reports, do we have to worry and what sources of energy are best?
China's attempt at Replicating chain proton Fusion is not impossible, and it would be trivial and to make it over parity, however that being said it's not enough that the plasma is stabilized forever. The issue is energy parity and the fact that the needed parity is 30 years away. We would need a magic-material, perhaps far off in the hypothetical island of stability on the periodic table, that could withstand all of the 4th, 5th and 6th state of matter: Plasmas. We need even more powerful magnetic fields: 14+ MeV to repel neutrons and control their net directions, cooling the high heat loads is insufficient because cosmic-rays produced by the reaction ruins all of your equipment within 50 yards.
Another issue is the same one Mcdonald's beancounters face to automate their restaurants. Simple napkin math Capitalism and the minimum required return on investment dictates that your automated system has to be 100x better than minimum wage alternative, and it isn't. The best source of energy, for now, is fossil-sugars pushed underground by plate tectonics and compressed to rocks or fluid, after, that solar panels but you'll need a lot more of them. You'll have to wait for a more complete model of quantum mechanics before a Clean and safe Mr Fusion the size of a refrigerator is found powering your city or interstellar vehicle.