NIO shares rose more than 10% in early trading.Nio Inc plans to begin taking bookings for its electric sedan ET7 from mid-January onwards, cnEVportreported, citing the team working on the model.The ET7 is the fourth vehicle to go on sale from Nio’s lineup of electric vehicles.Nio launched the flagship sedan ET7 in January at the company’s annual day, complete with its second-generation electric drive system, and it is expected to compete with Tesla Inc’s Model S sedan.