Chu Yuyan was introduced as the beautiful fiance of Wang Tengfei. Through a series of events, she ended up being captured by Meng Hao and forced to concoct the Perfect Foundation Pill. During that time, she also gave him advice which helped him during the Blood Immortal Legacy tournament. Later, she was seen in Meng Hao’s presence, wearing his clothes. This led to rumors (primarily propagated by Fatty), that she was having an illicit affair behind Wang Tengfei’s back. Angered, Wang Tengfei participated in the Song Clan search for a son-in-law, after which Chu Yuyan returned the engagement agreement to the Wang Clan, thus ending their relationship.
Later, Meng Hao joined the Violet Fate Sect under the Fang Mu persona. Chu Yuyan immediately disliked Fang Mu, and repeatedly attempted to find out why. Later, she developed a fascination with Grandmaster Pill Cauldron, who was of course Fang Mu/Meng Hao.
In the Violet Furnace Lord trial by fire, she finished third overall after Fang Mu and Ye Feimu, but was nonetheless permitted to become a Violet Furnace Lord.
In the mental realm of the Immortal's corpse, she and other Violet Fate Sect disciples were saved by Meng Hao/Fang Mu. Shortly thereafter, she learns that Feng Mu and Meng Hao are on-in-the-same, and is left with complex emotions.