What is the relationship between duet and Pingju?

Pingju is one of the most popular operas in northern China and one of the five major operas in China. Some people think it is the second largest drama in China. In the late Qing Dynasty, it was formed on the basis of the ditty "Lotus Falls Opposite" in Luanxian County, Hebei Province. It was first popular in rural areas of Hebei province, and then entered Tangshan, and was called "Tangshan Xiazi". It was popular in Northeast China around the 1920s, and a number of actresses appeared. After 1930s, under the influence of Peking Opera and Hebei Bangzi, the performance of Pingju became more and more mature, and schools such as "Bai", "Bai", "Picking Lotus" and "Ai Lianjun" appeared. After 1950, the plays such as Little Son-in-law, Liu Qiaoer, Flowers as Media, Complaining to Third Sister Yang, Qin Xianglian and so on had great influence in the whole country, with new, famous, famous actors appearing. Pingju is still popular in North China and Northeast China.

Errenzhuan is a folk art and local opera in northeast China. It is a form of traditional Chinese opera that is widely spread in Jilin Province, Liaoning Province, Heilongjiang Province and parts of Inner Mongolia Autonomous Region. It is called Xiaoyangge, Biju, Bouncing, Koukou, Liu Feng, Haruka, Banban Opera and Nasal Bianqu. The duet has a history of about 300 years, and it combines various folk art forms such as Northeast Yangko, folk rap Lotus Fall, traditional opera, Northeast folk songs, jokes, juggling and so on.