What are the four beams and four columns of the Northeast Erren Zhuan?

There are many traditional songs of Errenzhuan, with more than 300 songs. Artists have the saying of "four beams and four pillars". "Siliang" refers to four sets of music, including Steel Guide, Pure Law, Xunyang Building and Tieguan Map. "Four pillars" refers to four sets of music: The West Chamber, Lanqiao, Ghost Array and Li Cuilian Pandao. This is also the specialty of the two-person artist. In addition, there are Shuang Suoshan and Huarong Road. In recent decades, a large number of new creative tracks have appeared, such as Harvest Bridge, Picking up Girls, Liu Chuntao and so on. , very popular.