The Swiss Pavilion at the Shanghai World Expo is inlaid with LED illuminators around the pavilion to make it shine in each pavilion.
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It is understood that there are about 10,000 flashing illuminators using LEDs around the Swiss pavilion. These illuminators are red discs with a diameter of about 20cm. They are equipped with silicon-based solar cells, rechargeable batteries and LEDs of about 4cm square. After a certain period of sunlight, the LED will flash. Thanks to the battery, the battery-storage power can continue to flash at night, and the walls look like countless stars flashing. 
