Li Xiang was earning 10 times more than his parents from part-time jobs when he left school in 1999 to focus on a website before starting Autohome Inc., China’s premier car-buying portal. Now, he plans to not just sell vehicles, but design and build them too. QuickTake Cleaner Cars Chehejia, or “Car and Home,” has raised 2.5 billion yuan ($380 million) in venture-capital funding since Li started the Beijing-based electric-vehicle business in July. A self-confessed…