Photo taken on Aug. 10, 2015 shows Buddha statues in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Tourists view a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province, Aug. 30, 2015. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Photo taken on Aug. 10, 2015 shows a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Photo taken on Aug. 30, 2015 shows a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Photo taken on April 25, 2015 shows Buddha statues in one of the caves of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Tourists take selfie with a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province, Aug. 30, 2015. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Photo taken on April 25, 2015 shows a Buddha statue in one of the caves of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Photo taken on Aug. 30, 2015 shows Buddha statues in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Tourists view a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province, Aug. 10, 2015. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Photo taken on April 25, 2015 shows a statue outside one of the caves of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Tourists sit at the foot of statues in Fengxian Temple, the largest cave of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province, July 7, 2013. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Photo taken on April 25, 2015 shows a statue in Fengxian Temple, the largest cave of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Tourists view Buddha statues in Fengxian Temple, the largest cave of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province, July 7, 2013. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Photo taken on Aug. 30, 2015 shows a Buddha statue in one of the caves of the Yungang Grottoes, a 1,500-year-old Buddhist site in north China's Shanxi Province. Listed as a UNESCO World Heritage site in 2001, the Yungang Grottoes contain more than 51,000 statues of the Buddha, with the largest measuring 17 meters high and the smallest two centimeters. (Xinhua/Wang Song)

Tourists view Buddha statues in Fengxian Temple, the largest cave of Longmen Grottoes, a world cultural heritage site near Luoyang City in central China's Henan Province, April 25, 2015. Longmen Grottoes has more than 2,300 grottoes with 110,000 Buddhist figures and images, over 80 dagobas and 2,800 inscribed tablets, created between the Northern Wei Dynasty (386-557) and Song Dynasty (960-1279). (Xinhua/Wang Song)

Photo taken on Nov. 15, 2014 shows Buddha statues in Huangze Temple in Guangyuan City, southwest China's Sichuan Province. (Xinhua/Wang Song)

Photo taken on Nov. 15, 2014 shows a Buddha statue in Huangze Temple in Guangyuan City, southwest China's Sichuan Province. (Xinhua/Wang Song)

Photo taken on March 31, 2016 shows the statue of the Leshan Giant Buddha in Leshan City, southwest China's Sichuan Province. The 71-meter-high Buddha statue, carved into a cliff and overlooking three converging rivers, was built over a 90-year period starting in the year 713 during the Tang Dynasty. The Leshan Giant Buddha, as part of Mount Emei scenic area, was put on the UNESCO World Cultural Heritage list in 1996. (Xinhua/Wang Song)

Photo taken on Dec. 8, 2014 shows Buddha statues in the scenic area of Xiangtangshan Grottoes in Handan City, north China's Hebei Province. (Xinhua/Wang Song)

Photo taken on Sept. 12, 2015 shows a Buddha statue in the scenic area of Xumishan Grottoes in Guyuan City, northwest China's Ningxia Hui Autonomous Region. The Xumishan Grottoes, which were built between the Northern Wei Dynasty (386-534) and the Tang Dynasty (618-907), have more than 500 Buddhist statues and were listed as a key state-level cultural site in 1982. (Xinhua/Wang Song)