I consider China one of the most developed countries from an engineering and process perspective, and most suited to import trash for energy generation compared to ecologically and socially unacceptable alternatives due to potential harm to the environment and humans. If trash will be generated, it must be disposed of, and it can be responsibly managed by importing for energy, I see no issue.
China's already selling waste incineration power plant tech to other countries. They can build their own plants to handle their waste.
In China, these power plants are part of the urban waste management system, they are built to process trash, not to generate profit. As a waste disposal measure, their capacity must exceed the city’s waste production rate; otherwise, garbage would pile up.
