Is Su or Su the founder of Taoist Inner Dan? Are they the same person?

Lu Daoism originated in Sui and Tang Dynasties and was advocated by He. In Taoism, it is also called "Inner alchemy", that is, it takes itself as the "furnace tripod", takes the "essence, harmony and spirit" in the human body as medicine, and exercises with "spirit". Through the internal nourishing methods such as embryo rest, guidance, walking and thinking, essence and harmony can be achieved. Neidan Daoism was first described by Su Yuanlang, the son of Sui Dynasty, and later created by Liu Zhigu, Cui Xifan, Shi Jian Wu, Xiao Peng, Chen Tuan and others, so the classic Daoism works of Neidan Daoism came out one after another, such as Medicine Mirror by Cui Xifan, A Mirror of Dan Zhi Xin by Zhang Yuande, Inner Dan Classic by Zhi Tao and Inner Dan Classic by Yang Shenwei. Wu Yun's Nine Chapters of the Southern King's Inner Dan, Lin Taigu's Dragon and Tiger Return to Dan, Dong Shiyuan's Dragon and Tiger, Lingbao Dafa, Chapter 39, Song of Sword Pointing to Great Dan and Zhi Xuan Pian, and Lu's Sword Avoidance and the Secret of Dragon and Tiger's Golden Dan were also awarded.