OK, so what you mean is, million and mega happen to share the initial, and trillion and tera happen to share too, but billion and giga happen to not share an initial.
I would clarify that numbers won't be grossly exaggerated. Because can't disguise compounding numbers for more than a few cycles. Over reporting GDP by 2% consistently for couple decades and real economy would be only 2/3 size as projected. Under report covid for a few days and you have millions of cases instead of hundreds. Also PRC epidemic controls / contact tracing require accurate reporting to even work. The outbreak numbers since March 2020 have been so small that large discrepancies would be hard to hide.
Btw, it's 1.5G, not 1G.
Btw, the Chinese government lies about many things but the COVID case numbers weren't lies, at least no lies after March 2020.