He Duoling's work Spring Breeze Is Awake. [Photo provided to China Daily]

The oil painting, All People Are Great and Divine, was produced more than five decades ago by three painters, Hou Yimin, Deng Shu and Zhou Lingzhao, on a canvas that was 7 meters long.

It has late Chairman Mao Zedong in the center, surrounded by soldiers, farmers, workers and people from the 56 ethnic groups of China. It was inspired by a verse from Mao's poem of 1958 called Song Wen Shen (Send Away the God of Plague).

This year also marks the 80th anniversary of the end of the Long March, a two-year-long military retreat undertaken by the Communist troops to evade encirclement by the Kuomintang army. Artworks, which pay tribute to the Long March are also on show, including paintings and lithographs by Shen Yaoyi who revisited the motif for about four decades.

His best-known works, Red Ribbons of the Earth and Again We Make Strides, are on display.