BEIJING (Reuters) - China, which overtook the United States as the world's No. 1 auto market in January, sold 923,154 cars last month, 79.6 percent more than a year earlier, state media reported on Saturday. That would suggest a month-on-month drop of about 9.8 percent from September, when sales jumped 83.62 percent from a year earlier to 1.02 million units, according to data provided by the China