A sales slump at Tesla (TSLA) has extended into the new year. In China, sales were down 11.5 percent in January. Tesla isn’t keeping up with fierce homegrown competition. For example, during the same period,

U.S. automaker Tesla's sales of China-made electric vehicles fell 11.5% to 63,238 units in January from a year earlier, data from the China Passenger Car Association showed on Friday. Deliveries of China-made Model 3 and Model Y vehicles were down 32.