In the past decade, the electric vehicle industry has made great progress. However, in front of the eximus IV railway car built by a group of students, its energy efficiency is still a little poor. It is reported that eximus IV has just won the title of “the most energy-saving electric vehicle in the world” in the annual Delsbo electric competition. < / P > < p > the Delsbo electric competition in Sweden requires students to build ultra efficient electric vehicles that can hold up to six passengers. It is placed on track and teams need to work hard to keep rolling and wind resistance to a minimum. < / P > < p > in the calculation of results, the organizers will rank the teams according to their average energy consumption on the 3.36 km (2.1 mile) route. < / P > < p > for example, in 2016, eximus team achieved 0.84 watt hour per kilometer per person, and last year, the number was reduced to 0.603. < p > < p > Delsbo electric, the organizer of the competition, said that the energy efficiency of all the participating vehicles this year is quite high, even more energy-saving than that of the ordinary car’s headlights, but eximus IV still won the championship with 0.517 watt hours per kilometer per person. Prof. Henrik R ü djeg å Rd, chief technical officer, pointed out that in theory, the car could “travel half the world” with an ordinary person on only 1 liter (0.26 Gal) of gasoline. < / P > < p > of course, the eximus team has not always been very smooth, for example, it experienced a surge in energy consumption due to the 8 mm (0.3 inch) gap between the wheel and a point on the rail. After 12 years, “world class Super project” Shantou Bay Tunnel ushers in a historic breakthrough today