Beijing Opera is form of Chinese opera, (combine) acting, talking, singing, music, dancing and acrobatics, all of are difficult to master. That's it is one of China's national (treasure). There are four roles and each role has (it) own singing and acting styles. In early days, Beijing Opera was usually performed on open-air stages, so the performers had to sing very high voices in order to be heard over the crowds. And in the past it was often performed on stages that were (light) only by oil lamps. The costumes had to have bright and colourful patterns. , it would have been difficult to attract the audience's attention. It's (absolute) amazing.
