Answer:
China
In 2018, the Chinese GDP in nominal terms stood at $13.37 trillion, lower than the U.S. by $7.21 trillion. In 2020, the gap is expected to reduce to $7.05 trillion, and by 2023, the difference would be $5.47 trillion. In terms of GDP in PPP, China is the largest economy, with a GDP (PPP) of $25.27 trillion.