I will. For an enterprise established in Shanghai, the electronic signature will expire if it can't pass a window, and because the validity period of the electronic signature is only 24 hours, it will expire after it passes, so it will expire. China's largest industrial and commercial city, municipality directly under the Central Government, mega-city in the world and one of the top ten ports. This land is near the mouth of the Yangtze River. The area is 6 186 square kilometers.