The American and Chinese economies both grew at the same rate in Q3: 4.9%

The Chinese economy beat Q3 expectations by coming in at 4.9% growth. The US economy also beat expectations and came in at 4.9% growth. Both growth rates are expected to slow in the coming quarters. 

It appears that China's economy will never even come close to matching the size of the US economy, despite China's much larger population. The US GDP is over $26 trillion, while the Chinese GDP is less than $18 trillion

On a per-capita GDP basis (a general measure of the average economic wealth of citizens), China's economy is about average, globally. The Chinese people are, on average, significantly poorer than Mexicans and even Russians