What is the symbolic meaning of the green, blue, red, black and yellow colors of the Olympic Volunteer ''Smile Circle''?

The "Smile Circle" released by the 2008 Olympic Games volunteers has red, yellow, black, blue and green colors with different meanings

Xinhuanet, Beijing, January 1 (Li Xiang, Li Jiangtao) December 31, 2006 At 23:35, the much-anticipated “Smile Circle” for Beijing Olympic volunteers was officially released in Beijing’s Drum Tower Square. After more than two months of survey and collection among Beijing citizens, the symbolic meaning of the "smile circle" was finally determined: red represents helpfulness, yellow represents civility and etiquette, black represents honesty and trustworthiness, blue represents learning and enterprising, and green represents protecting the environment.

To celebrate the release of the "Smile Circle", the Bell and Drum Tower, located on the central axis of Beijing, staged a large-scale "light show" that lasted 300 minutes starting at 19:00 on December 31. The 734-year-old Bell and Drum Tower is covered in "laser neon clothes". Colorful laser beams are hundreds of meters long, waving like fluorescent sticks above the Bell and Drum Tower Square, and the night sky shines like daytime. Lasers and imaging lights were reflected on the bell tower wall, and the entire four outer walls of the bell tower turned into a huge projection screen. Images of Chinese athletes competing bravely in the arena and 2,008 smiling faces of Beijing citizens appeared on the wall. Slogans such as "Smiling Beijing" are also displayed on the outer wall of the Drum Tower.

Nearly a thousand Beijing residents living near the Bell and Drum Towers were also attracted by the lights and spontaneously joined the celebration. At 23:40, Liu Jian, Secretary of the Beijing Municipal Youth League Committee, announced the official release of the "Smile Circle" and revealed its symbolic meaning. Five large flags flowed from the Drum Tower to the main stage, with the meanings of the five-color smile circles written on the big flags. All 500 young volunteers in the audience shouted slogans: "Smile Beijing, volunteer for the Olympics, and create harmony in the world!" The drums and music at the scene combined with the applause and cheers of the volunteers and the audience into a grand symphony that resounded through the sky. The Bell and Drum Tower Square is boiling in the temperature of minus 6 degrees Celsius!

At 23:59:30, thousands of spectators and volunteers counted down in unison. At 0:00 on January 1, 2007, 12 representatives from various walks of life, including Deng Yaping, Xu Haifeng, Chen Zhangliang, Tai Lihua, and Yan Su, climbed to the bell tower and led volunteers to ring the nearly 600-year-old bronze bell. Bell; 108 melodious bells spread from the center of Beijing to the surrounding areas, blessing the Olympic Games and starting the "Smile Circle".

Tai Lihua, a representative of the literary and art circles, "said" in sign language: "Let us turn our smiles into strength and welcome 2007 together." Zhang Jian, who once swam across the Bohai Sea, said: "As a sports worker, Being able to welcome the New Year in this way is the most exciting moment in my life." Disabled athlete Sang Lan also came to the scene and sang loudly in his wheelchair, "The song of smile is sung all over the world." (End)