According to the official Weibo account of NIO on November 21st, Changan Automobile and NIO signed a cooperation agreement on battery swapping business in Chongqing. The two sides will cooperate in promoting the establishment of battery swapping standards, the construction and sharing of battery swapping networks, the research and development of battery swapping models, and the establishment of an efficient battery asset management mechanism to jointly promote high-quality development and low-carbon transformation of the automotive industry.