Automobili Lamborghini chief executive Stephan Winkelmann said Monday that by the end of 2013, auto sales in China will be on the same level as in 2012, disrupting two years of runaway sales growth, The Wall Street Journal reported. The maker of the Aventador and Gallardo supercars sold about 230 vehicles in China in 2012. Its sales rose about 30% each in 2012 and the year before. “China, for us, is a challenge right now,” Winkelmann told reporters in New Delhi, the challenge stemming from an economic slowdown and a government-sponsored curb on luxury spending. China is the second-biggest market for the Italian car maker, after the US.