1) China is already convinced. It's in the article. They are the world-leading user of solar power and are pushing harder than anyone to get away from dirty power.
2) Trump wants to push and invest in dirty power. He wants to significantly increase the production of coal and gas. The very stuff that causes global warming. Convincing Trump is about saving the world from itself. If Trump has his way, the last 20 years of progress towards renewable energy will be wiped out, with a strong possibility of making life very difficult for humanity in the next 50 - 100 years.