BEIJING The Chinese government is signaling enough is enough when it comes to the fierce competition in the country's electric car market. China 's industrial policy has engineered a remarkable transformation to electric vehicles in what is the world's largest auto market. In so doing, it has spawned far more makers than can possibly survive. Now, long-simmering concerns about oversupply and debilitating price wars are coming to the fore, even as the headline sales numbers soar to new heights.