A Thousand Trees on Rolling Hills, from the series "Sacrifice"

Album leaf; ink and colors on paper

One of fifty-four paintings (originally fifty-five); ink and color on paper

Album leaf; ink and color on paper

One of fifty-four paintings (originally fifty-five); ink and color on paper

Album with wooden covers; ink and color on paper

One of fifty-four paintings (originally fifty-five); ink and color on paper

One of fifty-four paintings (originally fifty-five); ink and color on paper

Hanging scroll; ink and colors on cotton paper; with signature of the artist reading "Liu Guosong"; with artist's square red intaglio seal reading "Liu Guo Song"

Hanging scroll; ink and colors on paper; with inscription and signature of the artist, the signature reading "He Huaishuo"; with four seals of the artist

Hanging scroll; ink and color on fibrous paper, with artist’s inscription, dedication, signature, and seals

One of fifty-four paintings (originally fifty-five); ink and color on paper

Hanging scroll; ink on paper, with artist’s dedication, signature, and seals