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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So

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 So