A visitor takes photos of artworks during the "Kala Pola 2020" in Colombo, Sri Lanka, on Feb. 23, 2020. The open-air art fair "Kala Pola 2020" was held in Colombo on Sunday, attracting thousands of visitors. (Photos: Xinhua)

Visitors look at artworks during the "Kala Pola 2020" in Colombo, Sri Lanka, on Feb. 23, 2020. The open-air art fair "Kala Pola 2020" was held in Colombo on Sunday, attracting thousands of visitors.

Visitors look at artworks during the "Kala Pola 2020" in Colombo, Sri Lanka, on Feb. 23, 2020. The open-air art fair "Kala Pola 2020" was held in Colombo on Sunday, attracting thousands of visitors.