China's economic growth over the past 30 years has been remarkable, with its dollar-denominated GDP rising from $400 billion in the early 1990s to over $18 trillion today. This rapid expansion has sparked speculation about when China's GDP will surpass that of the US. Citi Research analysts predict this overtaking could occur in the 2030s, possibly by the middle of the decade, depending on the pace of US and Chinese nominal GDP growth and exchange rate fluctuations. However, recent reports suggest that China's economic slowdown and internal challenges may delay or even prevent it from overtaking the US economy.