Great post indeed.

The actual physical economy of China has been bigger than the sum of G7 countries combined for years. As mentioned above, a few fields of manufacturing sectors need to catch up, which may take a decade or a generation in China. In other works, China will have become a developed and largest economy in the world by 2027.

Actual GDP of China has been bigger than the States since 2014 (see the CIA World Factbook website).