Answer to Question 1
Professionals who performed in opera in imperial China were much admired but held low status. Due to legal restrictions on mixed-gender troupes, some actors/actresses specialized in impersonating characters of the opposite gender (e.g., Cheng Yanqiu, a male famous for his female impersonations and lyrical, graceful vocal style).
By the 1920s Western ideas began to influence opera in China (Western musical instruments, Western-style theaters and props/scenery). Although traditional operas with historical settings still predominated, operas with contemporary social themes were also introduced.
With the founding in 1949 of the People's Republic, the Chinese Communist Party called for an increase in operas with contemporary themes and working-class characters.
After the end of the Cultural Revolution in 1976 the presentation of mythical and historical tales (or newly-written stories with a historical setting) resumed, with contemporary settings left in the main to other genres.
Answer to Question 2
Jingju combines four basic expressive means: singing, speech, acting, and fighting (chang, nian, zuo, and da).
Singing and speech embrace a range of modes of vocal production, from melismatic arias to the declamation of poems and everyday speech.
Acting and fighting also cover a wide range of expressions and behaviorsfrom facial expressions to postures, gestures, mime, and choreographed fighting and acrobatics.
Up to mid-twentieth century, troupes were often migratory, making transportation of simple scenery and stage properties more practical. Elaborate stage properties would also limit the chance for performers to display their skills in mime or acrobatics.