출처 : BatteryIndustryOn December 18, NIO officially completed its battery swapping network that covers China’s 9 north-south and 9 east-west main highways, connecting all major cities across the country, according to a post on the company’s WeChat account.This network spans 12 key city clusters, including the Beijing-Tianjin-Hebei region, the Yangtze River Delta region, the Guangdong-Hong Kong-Ma..