Signage outside the new Tesla South Austin showroom within the Yard development in Austin, Texas, U.S., on Saturday, Oct. 16, 2021. Mark Felix/Bloomberg Tesla’s China sales were out of this world. The stock, however, is barely budging because the numbers could have been extrapolated from earlier releases. Still, they contained valuable information for investors interested in where Tesla’s business–and stock–is heading next. Different data points come out at different times. Some steal the thunder from others. Everyone already knows Tesla delivered a lot of vehicles in the fourth quarter. But the Chinese delivery figure is still worth knowing. The production…