174 years ago today, on May 1, 1851 (April 1, 1851 lunar calendar), the first international exposition opened in London, England. On May 1, 1851, the first world exposition was held in London, England. The exposition mainly showcased the economic achievements and cultural traditions of the participating countries, and did not directly carry out trade activities. The exposition hall was built in Hyde Park in the center of London. The exhibition lasted for more than 5 months, with more than ten countries participating, and was open to the public. The exhibition brought huge economic and social benefits to the UK.