The appearance of the double rainbow was originally a normal natural optical phenomenon, but there is a folk saying that when we see the rainbow, it means that something happy has come to our door. When we see a double rainbow, it means good luck is coming, so it is a very auspicious thing. In addition, folklore circulating abroad also believes that it is very auspicious to see the rainbow, which indicates the emergence of wealth and is a symbol of prosperity.
20 12 On August 25th, a double rainbow appeared on the grassland not far from the local National Day Primary School in Yushu Tibetan Autonomous Prefecture, Qinghai Province. At this time, dark clouds suddenly gathered, followed by strong winds and heavy rain. After a while, two very clear and beautiful rainbows appeared in the sky for half an hour. At that time, volunteers from all over the country who participated in the grassland music festival raised their cameras to take pictures. According to local people, this kind of double rainbow is rare every year and is regarded as a symbol of good luck.