U.S. and Chinese flags are seen in this illustration taken Jan. 30, 2023. REUTERS/Dado Ruvic/Illustration/File Photo Acquire Licensing Rights SHANGHAI, Sept 19 (Reuters) - Geopolitics and a slowing economy are fuelling pessimism among U.S. businesses operating in China, with the proportion of firms optimistic about their five-year outlook in the country falling to a record low, a survey released on Tuesday said. Even after the ending of COVID curbs, which weighed heavily on both revenues and sentiment in 2022, the percentage of surveyed U.S. firms optimistic about the five-year China business outlook fell to 52%, according to the annual survey...