A woman and her daughter visit the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)

People are seen at the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)

Visitors are seen at the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)

A boy checks notebooks at the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)

Visitors walk by a billboard of a local stationery dealer at the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)

Visitors wash their hands at the entrance of the Colombo International Book Fair (CIBF) 2020 in Colombo, Sri Lanka, Sept. 27, 2020. As the largest book exhibition in Sri Lanka, the CIBF 2020 closed in Colombo on Sunday. This year's CIBF was held from Sept. 18 to 27 under strict COVID-19 health and safety guidelines. (Xinhua/Tang Lu)