What is the writing background of Liu Haisu's long live the motherland?

1949 after the founding of People's Republic of China (PRC), Liu Haisu felt the prosperity of the motherland and was full of confidence and hope for the future of the motherland, so he wrote this passionate poem, expressing his love and blessing for the motherland. Liu Haisu was in Shanghai at that time. He witnessed the scene of the PLA entering Shanghai with his own eyes and deeply felt the prosperity of the country and the happiness of the people. Knowing his responsibility and mission as a poet and painter, he wrote this poem "Seven Laws of long live the motherland" to express his blessing to new China and his bright future for the motherland. At the same time, he also expressed his support and praise for the cause of people's liberation, which reflected his deep feelings for the motherland and people as an artist. This poem was later widely circulated, and became one of the patriotic poems widely circulated by the people and the country of China, and was hailed as "a farewell song forever, which will go down in history forever".