What is the word "flying red scarf" in the poetry contest?

The original poem is as follows:

Ideally, on the morning of Children's Day, the morning glow of the rising sun passes through countless transparent hearts, and the flying pigeons take away all our blessings and flowers and grow up in the warm embrace and bright classroom of the motherland.

June 1 day, our festival, flowers, colorful flags, beautiful balloons are laughing, we are more willing to put a happy mood!

A pigeon whistle sounded over the campus where the five-star red flag Ran Ran rose. We salute the solemn national flag. The blood and life of outstanding Chinese sons and daughters have dyed the national flag red and won the sovereignty and respect that a nation and a country deserve. The belief that the motherland is above everything else is deeply embedded in our hearts. The red scarf on our chest flutters proudly, and strings of singing white clouds patrol the clear sky in Wan Li. We are like young trees, seedlings, hopes and longings.

Flying Red Scarf 60 years ago, 1 9491October1,our great people of China and the Republic of China were proclaimed; 10 June 13, the lovely child of the new Chinese mother, the Chinese Young Pioneers, was established, represented by the red scarf. Today, red scarves have been flying for 60 years from generation to generation. 60 years is a particularly important year in China, and people call him Jiazi.