The author points at supposed "overproduction" as proof that China is outgrowing demand, but this ignores the role of central planning. An alternative explanation is that they're actually trying to get prices down to distribute more commodities to more people.

It would be a fair argument if it were say, bread prices. But is solar production that elastic in demand? normal people don't buy solar panels or giant batteries, its mainly a capital good. the issue is China 'wants' other countries (say poorer countries) giving China US Dollars and other first-world currencies or their equivalents (which they need to obtain themselves by selling whatever they have to west or trying to attract capital inflows). China should give their solar panels to third world countries for free and help them break oil import dependencies.

Also, I don't get deflation. It seems extremely easy to solve? Just give people free money and they'll spend it and heat up the economy.

Most potent way would be to raise minimum wages sharply and set a floor wage (so that minimum wage can't be broken) by providing right to employment. Sound finance brainworms clouds what is possible.