French artist Guillaume Legros works on a piece of work in Istanbul, Turkey, Oct. 22, 2020. (Photo by Osman Orsal/Xinhua)

French artist Guillaume Legros works on a piece of work in Istanbul, Turkey, Oct. 19, 2020. (Xinhua)

French artist Guillaume Legros works on a piece of work in Istanbul, Turkey, Oct. 22, 2020. (Photo by Osman Orsal/Xinhua)

Photo shows a piece of work created by French artist Guillaume Legros in Istanbul, Turkey, Oct. 18, 2020. (Xinhua)

Photo shows a piece of work created by French artist Guillaume Legros in Istanbul, Turkey, Oct. 20, 2020. (Xinhua)

French artist Guillaume Legros works on a piece of work in Istanbul, Turkey, Oct. 22, 2020. (Photo by Osman Orsal/Xinhua)

Photo shows a piece of work created by French artist Guillaume Legros in Istanbul, Turkey, Oct. 23, 2020. (Xinhua)

Photo shows a piece of work created by French artist Guillaume Legros in Istanbul, Turkey, Oct. 24, 2020. (Photo by Osman Orsal/Xinhua)

Photo shows a piece of work created by French artist Guillaume Legros in Istanbul, Turkey, Oct. 23, 2020. (Xinhua)