"Repeatedly writing, the board is all worn out" means: writing day after day, year after year, the wooden board is worn out and the board is worn out.
Original text: When Huaisu lived in Lingling, he was poor and had no paper to write on, so he planted more than 10,000 banana trees, used banana leaves for swaying, and named his nunnery "Green Sky". There were not enough books, so he painted a plate of books and then painted a square board. After writing over and over again, all the boards were worn.
Translation: When Huaisu lived in Lingling, he was very poor and had no paper to write calligraphy, so he planted more than 10,000 banana trees and used banana leaves to write calligraphy and ink. He called his nunnery "Green". Tian'an". There was no place to write, so I found a wooden tray and a wooden board, painted them with paint, and used them as an inkstone and calligraphy board. Grind the ink every day, write every day, grind it again when the ink is dry, and write again after grinding it; wipe it after writing, wipe it clean before writing. Day after day, year after year, the wooden discs were worn away and the wooden boards were worn out.
Huai Su, a calligrapher of the Tang Dynasty
He became a monk since he was a child. In his spare time, he loved calligraphy and practiced Zen. He was as famous as Zhang Xu and was collectively known as "Dian Zhang Kuang Su" and formed the Tang Dynasty. The coexistence of the two peaks of modern calligraphy is also the two peaks in the history of Chinese cursive calligraphy.
In the first year of Dali of the Tang Dynasty (766), Huai Su wrote "Eight Poems on Autumn Xing". In the second year of Dali of Tang Dynasty (767), Huaisu went south to Guangzhou to learn calligraphy from Xu Hao. Around September of the seventh year of Dali in the Tang Dynasty (772), Huaisu returned to his hometown and detoured southward to Luoyang, the eastern capital, to visit Yan Zhenqing. "Autobiography" was created on August 6, the eleventh year of the Dali calendar of the Tang Dynasty (777).
In the 15th year of Zhenyuan of Tang Dynasty (799), Huaisu returned to Lingling and wrote "Xiaocao Thousand Character Essay". Huaisu's cursive calligraphy is thin and vigorous, with natural flying movements, like a sudden rain and whirlwind, changing at any time. He has interacted with many famous people such as Li Bai, Xu Hao, Wu Tong, Yan Zhenqing, Lu Xiang, Lu Yu, Dai Shulun, Su Huan, etc.