China's GDP is doing great, and GDP growth is the only thing that matters to quite a few people.
China’s 2015 GDP Was Exaggerated By Fake Data, Analysis Shows (https://www.bloomberg.com/news/articles/2018-02-01/china-s-2...)
Another Chinese city admits 'fake' economic data (https://www.reuters.com/article/us-china-economy-data/anothe...)
This Is How China's Regions Fare in the Fake GDP Data Stakes (https://www.bloomberg.com/news/articles/2018-01-19/this-is-h...)
They fake data to move gdp fractions of a percent.
Outright lying doesn't help further your argument. There's some excellent independent estimates of Chinas gdp out there.