Who is layman Yujun? What does he believe in?

Layman Yujun, whose original name was Zhang Dali. He is a calligrapher and painter, a member of the Taoist Medical Association, and a researcher of Chinese studies. He studied under Taoist Master Ziyun of Longhushan Zhengyi sect, a native of Zaoshan, Zhangshuge, Jiangxi, and a descendant of Zhangbang. He was engaged in calligraphy and painting in his early years. He has high attainments in calligraphy and painting. He has held many personal exhibitions in Guangzhou. By chance, I was taught by Taoist Master Ziyun, and I began to study Feng Shui, I Ching, Chinese Studies, etc. in depth. Because of his family's profound medical knowledge, he was later named Yujun by the Longhushan Zhengyi sect of Taoism.

Note: Zhangshu Pavilion Zaoshan is the place where Ge Xuan, one of the four great Taoist masters, made alchemy. Ge Xuan is commonly known as Ge Xian Weng, also known as Tai Chi Immortal Weng. Gezao Mountain is one of the thirty-three caves and blessed places in the Tang Dynasty, and one of the three Taoist talisman mountains (Longhu Mountain, Maoshan, and Gezao Mountain).