As of my knowledge cutoff in September 2021, there isn't an official figure on how much land China owns in the United States.
The U.S. government does not specifically track land ownership by foreign countries.
However, it is known that China has made significant investments in various sectors in the United States, including real estate, agriculture, and businesses.
These investments may involve acquiring land indirectly, such as through purchasing companies or properties.
It's important to note that the extent of Chinese ownership can vary over time, and the most up-to-date information may be available from government agencies or private research organizations specializing in foreign investments.