Some context: A marching band is a group in which instrumental musicians perform while marching, often for entertainment or competition. Instrumentation typically includes brass, woodwind, and percussion instruments. Most marching bands wear a uniform, often of a military style, that includes an associated school or organization's colors, name or symbol. Most high school marching bands, and some college marching bands, are accompanied by a color guard, a group of performers who add a visual interpretation to the music through the use of props, most often flags and rifles.
Many bands have auxiliaries that add a visual component to the performance. For ceremonial bands, this could be a traditional color guard or honor guard. For drum & bugle corps and corps-style field bands, this could include Dance lines, majorettes, Auxiliary units may be collectively referred to as color guard or visual ensemble.  Auxiliaries may perform as independent groups. In the early 1970s, color guards began to hold their own competitions in the winter (after the American football season, and before the beginning of the summer drum and bugle corps season). These became known as winter guard. There are also numerous dance competitions in the off-season.  The color guard of a marching band or drum and bugle corps may contain sabers, mock rifles, and tall flags. In modern bands, other props are often used: flags of all sizes, horizontal banners, vertical banners, streamers, pom-poms, even tires, balls, and hula hoops or custom built props. The color guard may also employ stage dressing such as backdrops, portable flats, or other structures. These can be used simply as static scenery or moved to emphasize block drill, and are often used to create a "backstage" area to store equipment and hide personnel.  While military color guards were typically male, band color guards tend to be primarily female, though it is becoming more common for men to join as well. A few independent units are all-male. Guard members nearly always wear a special uniform or costume that is distinctive from that of the band, not necessarily matching in design or color. The men's and women's guard uniforms are usually designed in one of two ways: nearly identically, but with gender-specific parts (i.e. skirts) adapted for the use of the opposite sex; or complimentarily, with the two uniforms designed similarly but with variations in color or form. The color guard uniform, especially in a high school marching band, need not be in school colors; in fact, they rarely are. These uniforms are designed to represent a certain aspect of the halftime show, characterize the guard members through costumes, or tell some sort of story, and can thus be in any design or color (a surprisingly common complaint among the high school audience is that guard uniforms and equipment "aren't school colors").  Indoor color guards have become popular within high schools and universities throughout the United States. These groups perform a theme-based show in competitions after the outdoor marching band season ends. Indoor color guard shows are typically performed in school gymnasiums and are adjudicated.
What do they change
A: In modern bands, other props are often used: flags of all sizes, horizontal banners, vertical banners, streamers, pom-poms, even tires, balls,
Some context: Xi Jinping (; Chinese: Xi Jin Ping ; pinyin: Xi Jinping; born 15 June 1953) is a Chinese politician currently serving as General Secretary of the Communist Party of China, President of the People's Republic of China, and Chairman of the Central Military Commission. As Xi holds the top offices of the party, the state, and the military, he is sometimes referred to as China's "paramount leader"; in 2016, the party officially gave him the title of "core" leader.
Xi Jinping was born in Beijing on 15 June 1953. After the founding of the People's Republic of China in 1949 by Mao Zedong, Xi's father held a series of posts, including propaganda chief, vice-premier, and vice-chairman of the National People's Congress. Xi's father is from Fuping County, Shaanxi, and Xi could further trace his patrilineal descent from Xiying in Dengzhou, Henan. He is the second son of Xi Zhongxun and his wife Qi Xin.  In 1963, when Xi was age 10, his father was purged from the Party and sent to work in a factory in Luoyang, Henan. In May 1966, Xi's secondary education was cut short by the Cultural Revolution, when all secondary classes were halted for students to criticise and fight their teachers. The Xi family home was ransacked by student militants and one of Xi's sisters, Xi Heping, was killed. Later, his own mother was forced to publicly denounce him as Xi was paraded before a crowd as an enemy of the revolution. Xi was aged 15 when his father was imprisoned in 1968 during the Cultural Revolution; Xi would not see his father again until 1972. Without the protection of his father, Xi was sent to work in Liangjiahe Village, Wen'anyi Town, Yanchuan County, Yan'an, Shaanxi, in 1969 in Mao Zedong's Down to the Countryside Movement. After a few months, unable to stand rural life, he ran away to Beijing. He was arrested during a crackdown on deserters from the countryside and sent to a work camp to dig ditches. He later became the Party branch secretary of the production team, leaving that post in 1975. When asked about this experience later by Chinese state television, Xi recalled, "It was emotional. It was a mood. And when the ideals of the Cultural Revolution could not be realised, it proved an illusion."  From 1975 to 1979, Xi studied chemical engineering at Beijing's prestigious Tsinghua University as a "Worker-Peasant-Soldier student", where engineering majors spent about one-fifth of their time studying Marxism-Leninism-Mao Zedong thought, doing farm work and "learning from the People's Liberation Army".  From 1979 to 1982, Xi served as secretary for his father's former subordinate Geng Biao, the then vice premier and secretary-general of the Central Military Commission. This gained Xi some military background. In 1985, as part of a Chinese delegation to study U.S. agriculture, he stayed in the home of an American family in the town of Muscatine, Iowa. This trip, and his two-week stay with a U.S. family, is said to have had a lasting impression upon him and his views on the United States.  From 1998 to 2002, he studied Marxist philosophy and ideological education in an "on-the-job" postgraduate programme at the School of Humanities and Social Sciences, again at Tsinghua University, and obtained a Doctor of Law (LLD) degree, which was a degree covering fields of law, politics, management, and revolutionary history, though commentators have questioned this qualification.
What did this lead to
A:
Later, his own mother was forced to publicly denounce him as Xi was paraded before a crowd as an enemy of the revolution.