The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)

The 2025 Nanjing International Mineral, Gemstone and Fossil Expo opened at the Nanjing International Exhibition Center on May 15. Over 100 overseas exhibitors from more than 50 countries and regions participated in the event. The exhibition will run until May 19. (Photo/CFP)