Key Takeaways:Autohome is expanding its membership services to include used car dealers, and is also preparing a major expansion of its TTP used car trading platformThe company has opened 20 experience-oriented “Autohome Space” centers since launching the chain in September last year, including 17 in the last three monthsBy Doug Young In a recently developed market like China where everything is new, car services veteran Autohome Inc. (NYSE: ATHM) is playing the contrarian with a big new bet on used car trading. Such a bet may have once raised eyebrows, in a land where new homes, new cars and …