Please introduce the lyricist and songwriter of this song and their creative background.

1935 Nie Erqu, Tian Hanci1949 In July, the preparatory meeting of the new China People's Political Consultative Conference publicly collected the lyrics of the new Chinese national anthem from the whole country. By mid-September, * * * had received 694 drafts of the national anthem. After research, the judges felt that there was no ideal work. At a forum convened by Mao Zedong, the famous painter Xu Beihong suggested that March of the Volunteers could be used as the national anthem before there was an official national anthem. Zhou Enlai agreed after hearing this. He thinks that March of the Volunteers is magnificent, heroic, revolutionary and has a clear rhythm, which is suitable for playing and performing as the national anthem. Most of the participants agreed with Xu Beihong's suggestion. However, it has been suggested that the new China is about to be established, and the Chinese nation has stood in the east of the world. The lyrics of "The Chinese nation is in the most dangerous time" in March of the Volunteers should be revised. Zhou Enlai explained that the new China is about to be established, but there may be a war in the future, so we should be prepared for danger in times of peace. After the participants agreed to adopt March of the Volunteers as the national anthem, Mao Zedong said: Everyone thinks that March of the Volunteers is a good national anthem, so I think it's settled. Don't change the lyrics "The Chinese nation is at its most dangerous time". The lyrics are not out of date. Our people finally won through hard struggle, but they are still surrounded by imperialism. We must not forget the oppression of imperialism. We want to strive for complete independence and liberation, and we still have a hard struggle, so it is better to use the original words. He finally announced that he accepted Xu Beihong's suggestion. On September 27th, CPPCC representatives unanimously agreed to adopt march of the volunteers as the national anthem. During the Cultural Revolution, March of the Volunteers's lyrics were revised. 1982 the fifth session of the fifth national people's congress decided to restore march of the volunteers's lyrics and make march of the volunteers the national anthem of the people of China.