Bamboo grove bitterness is always the nickname of that calligrapher.

Xu is a national second-class universal Chinese character. The ancient Chinese character "Xu" first appeared in Oracle Bone Inscriptions in Shang Dynasty, which means to search indoors with torches. The calligrapher whose original meaning is "autumn" and the font size is ""is the pen name. Wang Yumin is a senior calligrapher, calligrapher, academician of Shanghai National Painting Academy, director of Changbai Mountain International Calligraphy and Painting Society, vice president of China Contemporary Calligraphy and Painting Research Association and honorary president of Oriental Art Research Institute.