On January 11, 1943, the United States and Great Britain relinquished by treaty their extraterritorial claims in China. This abandonment effectively ended the jurisdiction of the extraterritorial United States Court for China (established 1906) and the British Supreme Court in China.
Read more about the United States Court for China, which one scholar has called “probably the strangest federal tribunal ever constituted by Congress,” in a short online history of the US Ninth Circuit.