In which Chinese xianxia TV series does former genius Xiao Yan, after losing his powers, embark on a journey of cultivation and revenge with the help of an ancient soul residing in his mother's ring?

The Chinese xianxia television series that perfectly fits this description is Fights Break Sphere (Review), also known by its alternative title, Battle Through the Heavens. This popular drama centers on the character Xiao Yan, a once-gifted martial arts prodigy who inexplicably loses his cultivation powers. His subsequent struggles and the humiliation faced by his family are central to the initial plot.

The turning point in Xiao Yan's journey occurs when he discovers an ancient soul residing within a ring inherited from his deceased mother. This spectral mentor is Yao Chen, a powerful elder and his mother's former master, who had sought refuge in the ring. With Yao Chen's guidance, Xiao Yan begins an arduous path of cultivation, regaining his lost abilities and growing stronger as he seeks to uncover the truth behind his mother's death and avenge his family's honor.

Fights Break Sphere is an adaptation of a highly successful web novel by Tiancan Tudou, which has garnered immense popularity in China. The series exemplifies the xianxia genre, characterized by its focus on immortal heroes, cultivation practices, and intricate fantasy worlds where individuals strive to overcome adversity and achieve god-like powers. Xiao Yan's story is a classic tale of a fallen genius rising again, driven by a desire for justice and guided by an unexpected mentor, making it a compelling entry in the world of Chinese fantasy television.