What was the origin of Lao She's pen name?

Lao She (December 23, 1899-August 24, 1966) was a famous modern Chinese scholar and social practitioner. His pen name "Shu Qingchun" came from his original name, Shu Yi. He split the word "Shu" into two parts,"Shu Shu" and "Qingchun", which implied that he hoped his life and creation could bloom and prosper like flowers in spring. Shu Qingchun's pen name was used in 1925 when he published his first essay, Camel Xiangzi. Later, he gradually integrated his works and pen names into his name. For example, his son, Shu Junde, used "Shu Qingchun" as his name. Lao She often used a pen name in his works. For example, his novel, Lao Zhang's Philosophy, used the pen name "Lao Zhang". In addition to his pen name, Lao She, he also had another commonly used pen name,"Camel Xiangzi." This pen name originated from a character in his novel, symbolizing his love and persistence for a difficult life.