Beijing volunteers study historical relics in the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)

Beijing volunteers experience the VR glasses during their trip to the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)

Beijing volunteers experience writing on bamboo tubes, an ancient way of writing, during their trip to the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)

Beijing volunteers study historical relics in the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)

Beijing volunteers study historical relics in the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)

Beijing volunteers approach a set of chime, an ancient percussion instrument in the Capital Museum in Beijing, capital of China, May 18, 2016. Beijing volunteers were invited to take a free tour to the Capital Museum on the International Museum Day. (Xinhua)