What are the 4 major national treasures of Chinese theater?

One of the four major national heritages is Beijing Opera,

The four major national heritages: 1) Chinese martial arts - is the creation and development of the Chinese nation, with fitness, physical protection, defense against the enemy, the role of victory, known as one of the four major national heritages of China, for the people of all ethnic groups.

2) Chinese medicine - Chinese medicine is an important part of the country my splendid culture, is one of the four national heritages of the Chinese nation, in the international arena has a more and more significant impact, by the Chinese people and the world's people love and welcome. Over the past fifty years, Chinese medicine has made great achievements in all aspects.

3) Peking Opera--Chinese Peking Opera is China's "national treasure" with a history of 200 years. Peking Opera's name was first seen in the Qing dynasty Guangxu two years (1876) of the "Declaration", the history of the Pihuang, Erhuang, yellow cavity, Peking tune, Peking Opera, Ping Opera, State Opera, etc., the Qing dynasty, the Qing dynasty, Qianlong 55 years (1790), four Huiban Beijing and the Beijing theater, Kunqu, Han Opera, Yiyang, chaobao and other types of theater after 50 or 60 years of integration, the derivation of the Peking Opera, China's largest opera plays. Its repertoire, the number of performing artists, the number of troupes, the number of audiences, and the depth of its influence are all the highest in the country. Peking Opera is a comprehensive performing art.

4) Calligraphy - Calligraphy is the art of writing Chinese characters. In the long history of evolution and development of Chinese characters, on the one hand, it plays an important social role in the exchange of ideas and cultural inheritance, and on the other hand, it has formed a unique plastic art in itself.