In 1878, France hosted the World Expo in Paris. At the meeting, Bell invented the phone, Edison invented new technologies and new products such as phonographs and refrigerated ships. These epoch-making inventions give visitors...

In 1878, France hosted the World Expo in Paris. At the meeting, Bell invented the phone, Edison invented new technologies and new products such as phonographs and refrigerated ships. These epoch-making inventions have greatly encouraged the visitors. Technology has narrowed the gap between people. However, to make people even more surprised, this World Expo also held a series of historic world conferences. Such as postal conferences, currency conferences, standards for metrology and standards meetings, and art and literary heritage conferences hosted by the famous writer Victor Hugo. It has created a combination of the World Expo and international conferences, enriched the activities of the World Expo, and played a positive role in further promoting the exchange and development of economy, science and technology and culture.