BEIJING -- On the showroom floor of a SAIC-GM-Wuling Automobile dealership in Chongqing, a salesman enthusiastically recommended the Wuling Hong Guang Mini EV, an electric car that has quickly won over Chinese drivers since its nationwide launch in July. The boxy compact lives up to its name, measuring less than 3-meters long and 1.5-meters wide, yet can still accommodate four people. The price starts at 28,800 yuan ($4,460), though the most popular model, with air conditioning, goes for just over $5,000. "If you make a 13,000 yuan down payment, the rest will be interest-free," the salesman said. Though the Hong...