Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)

Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)

Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)

Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)

Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)

Photo taken on September 6, 2023 shows the 2nd Electric Eco Expo and the 7th Nanjing Electric Vehicle Charging Technology Expo at the Nanjing International Expo Center. The event showcased the cutting-edge products and technologies in battery charging and swapping, attracting participation from more than 300 renowned domestic and international brands. (CFP Photo)