A month or two ago I reported on the fact that the Chinese were planning to test a Tokamak fusion reactor. That test has now taken place, and has been hailed as a success because the machine managed to produce a plasma. Of course other Tokamak machines have produced plasmas before, but the Chinese have shown that they are up and running. They have plenty of incentive too. Their current energy plan involves building enough new power stations to supply the whole of the UK every year.