According to the query of Baidu Library, my explanation of being invincible under the immortal is one to one: it means that I am invincible above the immortal and absolutely invincible under the immortal. "Under the immortal, I am invincible, above the immortal, one-on-one" is Xu Yanbing's famous saying in the book "Knife Walking in the Snow", which is a summary of his strength.

Xu Yanbing, the character in the novel Fierce Knife in the Snow edited by the warlord of the bonfire drama, and the younger brother of Wang Xiu, the gun fairy, said, "I am invincible under heaven and man, and I am a warrior above heaven." His fighting capacity has reached the level of a fairy.