Aerial photo taken on June 8, 2020 shows the Longmen Grottoes scenic area illuminated at night in Luoyang, central China's Henan Province. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)

Tourists take part in a night tour at the Longmen Grottoes scenic area in Luoyang, central China's Henan Province, June 8, 2020. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)

Tourists take part in a night tour at the Longmen Grottoes scenic area in Luoyang, central China's Henan Province, June 8, 2020. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)

Tourists take part in a night tour at the Longmen Grottoes scenic area in Luoyang, central China's Henan Province, June 8, 2020. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)

Photo taken on June 8, 2020 shows the Longmen Grottoes scenic area illuminated at night in Luoyang, central China's Henan Province. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)

Photo taken on June 8, 2020 shows the Longmen Grottoes scenic area illuminated at night in Luoyang, central China's Henan Province. The Longmen Grottoes scenic area has introduced night tour programs since April 10 to meet tourist needs. Tourists can visit some of the finest Chinese Buddhist art here. (Xinhua/Li An)