Sales of new commercial and passenger vehicles dropped in China as the economy slowed in the first quarter, raising doubts about the country’s full-year auto sales target, The Wall Street Journal reported. From January to March, sales of commercial cars fell 10.6% year-on-year to 1.02 million vehicles, while sales of passenger cars declined 1.3% to 3.77 million. Total car sales for the first quarter were 4.79 million vehicles, down 3.4% from the previous year, according to a statement from China Association of Automobile Manufacturers. The association hasn’t yet officially cut its 2012 target of 8-10% full-year growth, despite the disappointing first-quarter figure and concern expressed by some officials in early March. “[Last year’s growth was] much lower than expected. That signaled to everybody that we’re going into one, two, three years of more realistic growth,” said Andrew Thomson, a partner in KPMG’s China automotive practice.