Conceptual artist and singer Yoko Ono in Beijing. [Photo by Jiang Dong/China Daily]

Ladders are a recurring theme in Ono's art. She refers to people's existence and efforts to reach the sky－the epitome of freedom, as well as the origin and the end of all things, according to her.

"Ono invites people to participate in her art world that is full of honesty, female strength and has a Utopian outlook on life," Zhang says.

Ono arrived in Beijing on Nov 13, the evening of which terrorists attacked Paris killing nearly 130 people and injuring hundreds of others.

"Please be patient," Ono said in a message of love and peace to the world.

Planted outside the Faurschou Foundation gallery in Beijing and a neighboring square is her Wish Tree recreation.

The work was first installed in Los Angeles in 1996, with Ono wishing for world peace. Since then, "the tree" has traveled around the world gathering more than 1 million wish tags. The wish tags were sent to Imagine Peace Tower, Ono's another installation in Iceland.

Ono says she doesn't read the wishes people send because they're meant to be "secrets between the sky and people".

Asked what if there were some people also wishing that the world is destroyed.

"I said, there are also so many beautiful and powerful wishes and the bad wish will bang and change into a good one. I don't mind it."

If you go

11 am-6 pm, Tuesday to Sunday, through July 3, 2016. Faurschou Foundation Beijing, 2 Jiuxianqiao Road, Chaoyang district, Beijing. 010-5978-9316.