I'm living in China since 2013 near Shanghai. Even though those cities were empty, they will eventually by filled because the Central Government is placing limits on how many people can stay in Beijing, Shanghai and Guangzhou, the 3 biggest metropolitan cities. There are 5 controlled directly by CPC.
Anyway as the consumer spending increases with the largess from the middle class, you can expect the growth to remain above 5% for the next 10 years. This is my opinion.
Watch out for the spending that will take place on New Silk Road (One Belt, One Road) projects.